Five-Flaw DeFi Scorecard
Test financial systems against five structural sources of friction
- Difficulty
- Moderate
- Time to result
- ~weeks to results
- Steps
- 5
- Confidence
- 95%
The scorecard evaluates financial infrastructure through five recurring flaws: centralized control, limited access, inefficiency, poor interoperability, and opacity. Start by determining who controls funds and whether users can transact without discretionary gatekeepers. Then assess whether access changes according to wealth, geography, or institutional status. Quantify spreads, fees, settlement delays, and other costs created by intermediaries. Examine whether assets and information move seamlessly between services. Finally, determine whether users can inspect balances, liquidity, rules, and system health. The framework does not assume decentralization is automatically superior; it makes the trade-offs visible so a system can be judged according to control, inclusion, cost, connectivity, and transparency.
Origin
Campbell Harvey presented these five flaws while explaining the central argument of DeFi and the Future of Finance on Masters in Business.
Core principles
- 01Control should remain with the asset owner.
- 02Access should not depend on customer size or status.
- 03Intermediaries must justify the costs they impose.
- 04Financial systems should transfer assets seamlessly.
- 05Participants need visibility into code, balances, and liquidity.
How to run it
- 1
Assess control
Determine who holds the funds, sets the rules, and can restrict transactions. Compare institutional discretion with the user's ability to control assets directly.
Pro tip Document every party that can freeze, delay, reverse, or redirect a transaction.
Watch out Direct control transfers custody and key-management risks to the user.
- 2
Assess access
Identify who can open an account, borrow, invest, or transact. Look for barriers based on geography, wealth, documentation, or customer size.
Pro tip Test the system from the perspective of an underbanked user or small entrepreneur.
Watch out Open access does not eliminate fraud, compliance, or suitability risks.
- 3
Measure inefficiency
Calculate explicit fees, hidden spreads, settlement time, and operational overhead. Determine how much value the middle layer captures.
Pro tip Compare the quoted exchange rate with the live market rate to expose hidden costs.
Watch out A zero advertised fee can still conceal spreads or payment-for-order-flow costs.
- 4
Test interoperability
Measure how quickly and reliably money or assets move between institutions and applications. Note manual processes, incompatible systems, and settlement delays.
Pro tip Trace one representative transaction across the entire system rather than assessing only the user interface.
Watch out A polished fintech interface may still rely on slow centralized infrastructure.
- 5
Inspect transparency
Determine whether users can observe balances, liquidity, system rules, and counterparty health. Compare verifiable information with reliance on regulators or institutional assurances.
Pro tip Separate information that is publicly verifiable from information users must take on trust.
Watch out Visible code and balances do not guarantee that users can interpret the risks correctly.
In the wild
A customer is told that a wire-transfer fee has been waived, but the bank quotes an exchange rate 2.5 percent away from the market. Applying the scorecard exposes centralized price control, a substantial hidden spread, and limited transparency despite the apparently free transfer.
→ The customer evaluates the full transaction cost rather than accepting the advertised fee.
A product offers a fast mobile interface but settles through existing banking rails. The scorecard distinguishes the improved user experience from the underlying system's settlement delays, access restrictions, and intermediary costs.
→ The evaluator recognizes digitization as an incremental improvement rather than structural decentralization.
Common mistakes
Assuming decentralization is automatically better
Centralized systems can offer faster governance, greater throughput, custody support, and legal protections. The scorecard should expose trade-offs rather than predetermine the winner.
Looking only at advertised fees
Hidden exchange-rate spreads, settlement delays, and back-office costs can matter more than the visible transaction fee.
Confusing a new interface with new infrastructure
A fintech application may improve usability while retaining the constraints of centralized banking rails.
Is it for you?
Best for
It is best for comparing banks, fintech products, payment networks, and decentralized protocols.
Not ideal for
It is not sufficient for evaluating token prices or conducting a complete technical security audit.
From the transcript
“Well, there are five things that I mentioned in the book UM Centralized control”
“Limited access we've already talked about where this is a technology of financial democracy.”
“What we haven't talked about is lack of interoperability as a problem in our current system”
From the episode
Campbell Harvey on the Future of Finance (Podcast)
Campbell Harvey