Complexity Is a Strategy, Not an Accident

Financial products are complicated, and the standard explanations — legacy systems, regulatory accretion, the inherent difficulty of the subject — are all partly true and all miss the mechanism that keeps complexity in place. A product priced on one dimension can be ranked against a competitor in seconds. A product priced on four cannot be ranked at all without arithmetic nobody will do. Adding a dimension costs a firm almost nothing, requires agreement with no one, and degrades comparison across the entire market rather than just its own corner. Which means complexity isn't something markets drift into despite competitive pressure. It's something competition selects for.

The mechanism

Our search analysis established that price dispersion persists when comparison costs more than it saves. That report treated comparison cost as a property of the market — something arising from loan sizes and consumer time.

Comparison cost is also a choice, and it's the seller's.

The chain is short:

1. Prices converge when customers can rank offers.
2. Ranking requires reducing each offer to one comparable number.
3. That reduction is easy on one dimension and hard on several.
4. A seller can add dimensions unilaterally.
5. So a seller can raise the cost of being compared to them.
6. And competitive pressure on price falls.

Nothing in that chain requires bad faith, coordination, or even intent. A firm that adds a fee tier because it improves margin has done step four; whether anyone reasoned through step six is irrelevant to the outcome. Structures that resist comparison earn more and survive, which is selection rather than conspiracy — and it's the same selection logic our asymmetry analysis applies to two-part pricing, generalized from one structure to the whole product.

Nobody has to coordinate. Structures that resist comparison earn more, so they survive — and a market ends up unreadable through independent decisions nobody would defend collectively.

What adding a dimension does

Work through what a customer faces as dimensions accumulate.

Dimensions	Example	To compare, the customer must	Will they?
One	A rate	Read two numbers	Yes
Two	Rate plus a fee	Combine them, needing an assumption about balance	Sometimes
Three	Rate, fee, and a term difference	Compute total cost over differing periods	Rarely
Four+	Add conditional charges and a bundled benefit	Forecast their own behaviour and value a benefit	Effectively never

The fourth row is where most consumer financial products sit, and it has a property worth isolating. Comparing conditional charges requires the customer to predict their own future behaviour — whether they'll carry a balance, overdraw, or miss the promotional deadline — which our asymmetry analysis argues they do badly and in a predictable direction. So complexity and self-prediction failure compound: the dimensions hardest to compare are precisely the ones the customer is worst at evaluating.

The typical dimensions available to add:

• A separate fee alongside a rate.
• Tiers conditioned on balance, volume, or status.
• Conditional charges that apply only in circumstances the customer expects to avoid.
• Bundled benefits of uncertain value — rewards, insurance, access.
• Term or structure differences that make totals non-comparable.
• Introductory periods with different pricing.
• Waivers conditioned on behaviour.

Each is individually defensible and frequently has a genuine rationale. The effect on comparability doesn't depend on the rationale.

Why it's unilateral and cheap

The properties that make this stable, and they're what distinguish it from ordinary price competition.

It requires no coordination. A firm adding a dimension doesn't need rivals to agree. Cartels are hard to sustain because members defect; this needs no agreement to defect from.

It's cheap. Adding a pricing dimension costs a system change and a disclosure line. Compare that to competing on cost, which requires actually being cheaper.

The benefit is unilateral and the damage is shared. The firm captures the margin. The degradation of comparability across the market is spread across everyone, including the firm's rivals — who benefit from it too. That's the crucial asymmetry: rivals have no incentive to punish the move, because it helps them.

It's defensible individually. Every added dimension has a story — this fee covers a real cost, this tier rewards our best customers, this benefit is worth having. The stories are frequently true, and no single addition looks like obfuscation.

It ratchets. Removing a dimension is visible and costs margin; adding one is routine. So the count rises over time, which is why products get more complicated and essentially never get simpler on their own.

Put together: the move is cheap, unilateral, individually defensible, beneficial to rivals, and irreversible in practice. There is no force in the system pushing the other way.

Why simplification is punished

The question that tests the argument: if customers dislike complexity, why doesn't a firm win by being simple?

Because a firm that simplifies unilaterally becomes comparable while its rivals remain unreadable.

Consider a lender that moves to one all-in rate with no fees. What happens:

• They can now be ranked against anyone, instantly.
• Their rivals cannot be ranked back, because those products still have four dimensions.
• Customers comparing will find the simple price and compare it against headline numbers from complex products — which are the attractive components, not the totals.
• So the simple product looks expensive against a rival's headline rate, even where its total cost is lower.

That's the trap, and it's genuinely hard to escape. An honest all-in price competes against everyone else's best-case price, and the customer isn't computing the difference — which is the whole reason the complexity existed.

Which explains an otherwise puzzling pattern: simple pricing is announced constantly and sustained rarely. It works as a position for firms with a genuine cost advantage large enough to win the unfair comparison, and it's punished for everyone else. Firms that try it and find themselves losing on headline numbers add dimensions back, and the announcement quietly stops being made.

The general result: complexity is a stable equilibrium and simplicity isn't. Not because customers prefer complexity, but because the first mover toward simplicity bears a cost their rivals don't.

The natural experiment

The strongest evidence sits inside a single transaction, and our closing analysis documented it without drawing this conclusion.

In a mortgage closing, the loan itself is disclosed through a standardized form producing a comparable total. Title insurance and settlement services on the same page are not standardized in the same way. And the observed behaviour is stark:

• The loan is shopped. Borrowers compare lenders, request estimates, negotiate.
• Title and settlement services are essentially never shopped, despite representing real money and despite the borrower's right to choose.

Same consumer, same transaction, same day, same decision-making capacity. The only difference is whether a standardized comparable figure exists.

That's about as close to a controlled experiment as this subject offers, and it points hard at comparability rather than at consumer effort, sophistication, or motivation. It also, read the other way, is evidence for this report's thesis: the component that isn't standardized is the one that stayed complex, and it stayed complex where a standardized alternative sat immediately beside it.

A second, weaker piece of evidence: where a single comparable figure is mandated, pricing dimensions are noticeably fewer. Products required to express cost as one standardized number tend to compete on that number, because there's nowhere else for the competition to go.

Why disclosure loses the race

Our disclosure analysis found that comparative disclosure works and descriptive disclosure doesn't. This report explains why the gap persists rather than closing.

A firm can add a dimension faster than a rulemaking process can standardize one. The asymmetry in speed is enormous — a product change takes months, a disclosure standard takes years — so a regime that responds to structures is permanently behind.

Worse, requirements to disclose components leave the comparison problem intact. A customer facing eight individually disclosed numbers still cannot rank two offers. Component disclosure satisfies transparency and does nothing for comparability, and the two get conflated constantly.

What follows for design, and it's the same conclusion our definitional analysis reached by a different route:

Mandate a single standardized total, computed on whatever structure the product has. Not a list of components. Not a requirement to be simple. One number, defined by economic function rather than by product form, that a customer can put beside another number.

Why this beats the alternatives:

• It's structure-agnostic, so it doesn't need updating when a new dimension appears — which removes the speed asymmetry entirely.
• It doesn't prohibit complexity, so firms retain whatever functional variety they need.
• It restores the ranking, which is the only thing that disciplines price.
• It removes the simplifier's penalty, because everyone becomes comparable at once.

That last point is the important one and it isn't obvious. The problem with unilateral simplification is that it's unilateral. A mandated comparable figure makes it universal, which converts a move that was competitively punished into one that costs nothing.

The same move in a different register

Worth naming the family this belongs to, because three of this desk's flagship analyses turn out to describe one thing.

Analysis	What escapes comparison	By
This report	The price	Adding pricing dimensions
Definitional arbitrage	The product category	Falling outside a definition
Intermediation chains	The responsible party	Distributing activity across firms

All three achieve the same thing by different means: they place something outside a comparable, attributable frame. Price becomes unrankable, product becomes uncategorizable, responsibility becomes unlocatable.

And all three respond to the same remedy shape — a standard defined by function rather than by form. A comparable cost figure regardless of pricing structure. A regulatory category defined by economic substance. A named accountable party regardless of how many firms are involved.

Which is a more useful conclusion than any of the three reports reached alone: the recurring failure in consumer finance regulation is defining requirements by form, and the recurring fix is defining them by function. That's one lesson, arrived at three times independently.

The strongest objections

"Most complexity is functional, not strategic." Substantially conceded and it doesn't defeat the argument. Different customers genuinely want different things, and a single simple product serves nobody well — a business borrower needing a revolving facility and one needing equipment finance shouldn't face the same structure. The claim is that a strategic component exists and is selected for, which explains persistence in a way functional variety doesn't: functional complexity would be stable, while strategic complexity ratchets, and what we observe ratchets.

"Regulation causes much of it." Partly true and genuinely awkward for any simple story. Rules mandate tiers, options, disclosures, and carve-outs, each of which adds a dimension — so some complexity is regulatory residue rather than strategy. Our response: this reinforces rather than undermines the recommendation. Requirements defined by form add dimensions; a single functional standard adds one and removes the need for others.

"You've asserted a mechanism without measuring it." Correct, and we've deliberately avoided quantifying. Distinguishing strategic from functional complexity requires knowing intent, which isn't observable. The argument rests on the structural properties — cheap, unilateral, rival-benefiting, ratcheting — and on the closing-table comparison, and the implications below are offered as tests rather than as confirmations.

Testable implications

1. Pricing dimension count should be lowest where a standardized comparable figure is mandated, and highest where none exists. Countable across products.
2. Announced simplifications should be disproportionately reversed or abandoned, and should survive mainly at firms with a demonstrable cost advantage.
3. Introducing a mandated comparable figure should reduce dispersion in the affected product without reducing product variety.
4. Complexity should be highest where margin depends most on non-comparison — contingent-charge products rather than commodity ones.
5. Dimension count should ratchet upward over time within a product category, with removals rare relative to additions.
6. Products with a mandated total should compete on that number, showing tighter clustering than products competing on headline components.

The second is the sharpest and the most checkable from public information. If simplification announcements are reliably followed by quiet re-complication, that's strong evidence the penalty is real — and it would be difficult to explain under any account where complexity is merely legacy or functional, since a functional simplification that customers valued would stick.

The conclusion we'd hold: complexity in consumer finance is not primarily a failure of design, a legacy of old systems, or an inevitable consequence of subject matter. It's a competitive equilibrium that no participant can leave alone, and the only thing that shifts it is a standard that makes everyone comparable at the same moment.

Frequently asked questions

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This report presents an analytical framework and the authors' interpretation; it is not legal, policy, or financial advice. The distinction between strategic and functional complexity is not directly observable, and no attempt is made here to quantify the share attributable to each; the implications identified as testable should be treated as hypotheses rather than established results.