Quiz: Programmable Money

Answer: (D) The lecture makes a critical distinction: digital does not equal programmable. A CBDC could be as "dumb" as a banknote or as "smart" as a conditional contract. PayPal moves money digitally but has no embedded spending rules in the money itself.

Answer: (A) These five are the "instruction set" of programmable money, analogous to AND, OR, NOT in Boolean logic. They can be combined: a welfare token might be conditional + time-based + geo-fenced + identity-gated + auditable simultaneously.

Answer: (B) Traditional finance layers rules on top of passive money (spending limits, fraud detection, account freezes). These rules live in bank databases, can be overridden, and require trust in the bank. Programmable money moves the rules into the currency itself: self-enforcing, transparent, and immutable.

Answer: (C) The lecture includes pseudocode: the spend function checks if merchant.category is in ALLOWED_LIST, then either transfers or rejects. The rule is in the money, not in the bank's database. The US SNAP program already restricts purchases to food, but enforcement is at the POS terminal, not in the money itself.

Answer: (A) Every transaction was also logged on PBoC infrastructure (auditable), making four rules in practice. The combination of geo-fencing and expiry maximized local spending velocity -- the key design insight of the pilot. As of April 2026, the PBoC reports cumulative e-CNY transaction volume in the trillions of RMB (CNY 1.8T+ disclosed for 2023), yet merchant adoption has largely stalled and most flows route through Alipay/WeChat Pay integrations rather than native e-CNY wallets. Source: PBoC annual reports 2022-2024; BIS Innovation Hub (April 2026).

Answer: (B) The 88% vs. 60-70% gap demonstrates the behavioural impact of programmable rules. Recipients also spent more than the 200 RMB at participating merchants -- 9.01 million RMB in incremental spending. The tokens acted as a catalyst, not just a subsidy.

Answer: (B) Luohu district was chosen for its dense retail environment (3,389 merchants). Combined with the 7-day expiry, the design ensured rapid local circulation. Traditional stimulus payments leak to national/international retailers and may be saved rather than spent.

Answer: (C) The lecture repeats this pattern for every rule type: identity-gating eliminates welfare fraud but excludes those without formal ID. Auditing provides transparency but enables surveillance. The lecture asks: "Would you accept this rule if someone else programmed it for you?" The privacy-versus-control tension drove the ECB in October 2025 to extend the digital euro preparation phase rather than launch, with holding limits (~EUR 3,000) and offline functionality still unresolved; the earliest realistic launch is now 2027-2028. Source: ECB Governing Council statement, 22 Oct 2025.

Answer: (B) The World Bank estimates 25-30% of welfare spending in developing nations is lost to leakage. In the worked example, programmable tokens reduce total overhead to 5% ($500K): middleman skim and ghost recipients drop to 0% (identity-gated), diversion drops to 2% (geo-fenced), and tech overhead is 3%.

Answer: (C) Building Blocks saved WFP ~$2.4 million/month in bank transfer fees at the Jordan Azraq/Zaatari camp peak and reduced fraud to near zero. Refugees are unbanked, so no bank accounts are needed; the iris scan replaces traditional KYC. As of April 2026, expansion plateaued after 2021-2022 -- scope was narrowed to Jordan and a handful of other WFP operations rather than the originally envisioned pan-UN roll-out, as biometric-governance and data-sharing concerns slowed interagency adoption. It remains the largest live blockchain humanitarian deployment. Source: WFP Innovation Accelerator reports 2023-2025.

Answer: (A) Programmable money removes the need for intermediaries in the payment chain. India's Aadhaar-linked Direct Benefit Transfer reduced welfare leakage by 40% using identity verification alone. Programmable money adds conditional and geo-fenced rules on top of identity-gating.

Answer: (A) GiveDirectly, a cash-transfer charity, already achieves less than 3% overhead by sending money directly to mobile wallets. Programmable money adds spending restrictions and full audit trails. The worked example shows $9.5M reaching victims vs. $7M with traditional cash.

Answer: (C) The Shenzhen pilot shows the beneficial side: 88% redemption vs. 60-70% for paper vouchers. But if a government can program money to expire, it can also punish dissidents by accelerating expiry on their accounts. The same feature serves opposite purposes depending on who controls it.

Answer: (D) The lecture draws a direct connection to SSI: identity-gating requires a digital identity system, linking programmable money to broader debates about digital ID, privacy, and state power. Those most in need of welfare are often those least likely to have formal identity documents.

Answer: (A) Late payments are estimated to contribute to tens of thousands of UK small-business failures each year (FSB surveys, 2023-2025). The UK Prompt Payment Code remains voluntary. Programmable escrow makes payment terms enforceable by code, not by legal action -- the money itself enforces the terms. Circle USDC (with a US federal trust charter under the July 2025 GENIUS Act) and bank-issued stablecoins such as JPM Coin / BNY pilots now provide production-grade rails on which this pattern can settle. Streaming-payment protocols (e.g., Sablier) have cumulatively streamed well over $100M along similar lines. Source: GENIUS Act (signed July 2025); FSB UK SMB sentiment tracker (2025).

Answer: (D) The lecture lists parametric insurance under corporate use cases for programmable money. Traditional insurance: claim, investigation, adjuster, negotiation, months of delay. Parametric: event occurs, oracle confirms parameter threshold, smart contract pays. Hours, not months.

Answer: (D) The lecture forces students to confront programmability limits: what about a birthday gift for a study partner? Emergency medical expenses? Mental health therapy? Every conditional rule must draw a line, and that line will inevitably exclude legitimate uses. "The edge cases are where the ethics live."

Answer: (D) The lecture explicitly contrasts these: opt-in programmability is empowering (the recipient chooses the rules), while top-down is potentially controlling (the issuer imposes them). The same technology enables both -- the question is who holds the power to write the rules.

Answer: (B) The lecture's architecture diagram shows two existing ingredients producing one new capability. Digital currency stores value; smart contracts execute rules. Programmable money is currency that carries both value and executable rules simultaneously. By April 2026 the stack is operational on multiple substrates: (i) the SNB's Project Helvetia III has been issuing live wholesale CBDC for institutional DvP on SIX Digital Exchange since December 2023, extended in 2024 to additional bank participants; (ii) the BIS Project Agorá (launched April 2024) links seven central banks (Fed NY, BoE, BoJ, BoK, Banque de France, Banxico, SNB) with 40+ private firms on cross-border wholesale CBDC plus tokenised deposits; (iii) the US GENIUS Act (July 2025) gives federally-chartered stablecoin rails legal clarity for programmable settlement. Source: SNB press releases Dec 2023 and Nov 2024; BIS Innovation Hub (April 2024); GENIUS Act (July 2025).

Answer: (C) The lecture's central thesis: programmable money is powerful when you set the rules, and dangerous when someone else does. Every feature has a dual use. The worked examples (Aisha, Chen, Eva) show real benefits, but the scholarship exercise and dual-use analysis show that total programmability is total control. The April 2026 policy landscape underscores both faces: the US GENIUS Act (signed July 2025) formalises private-sector stablecoin rails while Executive Order 14178 (Jan 2025) forbids a Fed retail CBDC without Congressional authorisation; the ECB extended the digital euro preparation phase in Oct 2025 rather than commit to launch; China's e-CNY remains large by disclosed volume but has stalled on merchant adoption; and the SNB's Helvetia III plus BIS Agorá concentrate programmability on the wholesale layer where democratic scrutiny is weakest. Who writes the rules is now a concrete, jurisdictional question. Source: GENIUS Act (July 2025); Executive Order 14178 (Jan 2025); ECB (Oct 2025); BIS CBDC tracker (April 2026).