Megan Greene on the Future of CBDC and How Central Banks Should Respond to Climate Change

Episode Summary

Executive Summary: David Beckworth and Megan Green discuss why central banks should move cautiously on CBDCs, warning that one design cannot solve payments, inclusion, competition, and geopolitical fears without major tradeoffs. They then explore whether climate change fits within central bank mandates, arguing it increasingly does via financial stability, inflation, and targeted financing for green investment, though legitimacy, taxonomy, and politicization remain major concerns.

Main Topics: CBDC caution and the case for going slow (Priority: 5/5): Green argues the rush toward central bank digital currencies is driven more by central-bank fear of losing control, Facebook/crypto, and China than by public demand, and that CBDCs may not solve the problems they are meant to address. CBDC design tradeoffs: retail access, bank intermediation, and privacy (Priority: 5/5): The conversation reviews retail vs. wholesale CBDCs, direct Fed accounts vs. indirect bank-administered accounts, and token vs. account-based authentication, highlighting risks to bank lending, KYC/AML burdens, and surveillance concerns. CBDC effects on monetary policy and payments (Priority: 4/5): CBDCs could strengthen policy transmission, enable negative rates and direct transfers, and improve domestic payments, but they also could raise bank costs and have limited ability to fix cross-border payments at scale. Climate change as a central banking issue (Priority: 5/5): Green revises her earlier skepticism and argues climate change now clearly affects central banks’ core mandates through growth, inflation, and financial stability, making inaction harder to justify. How other central banks are moving on climate (Priority: 4/5): The Bank of England and ECB are ahead of the Fed on disclosure, stress tests, and collateral/asset-purchase policies, while the Fed remains more cautious partly due to mission-creep and independence concerns. Tools for greening finance and the political economy of mandates (Priority: 4/5): They debate credit operations, collateral haircuts, and asset purchases as climate tools, along with concerns about legitimacy, taxonomy, greenwashing, and whether fiscal authorities should lead instead of central banks.

Key Arguments: CBDCs are being pushed mainly by central banks as a defensive response to Libra, crypto growth, China, and payment-system shortcomings—not because of clear consumer demand. A CBDC designed as a safer alternative to bank deposits could destabilize commercial banks by pulling deposits away and weakening their lending model. Direct central-bank accounts create major privacy, AML/KYC, and surveillance problems; indirect bank-administered models preserve banking expertise but still change the structure of finance. CBDCs could make monetary policy more powerful by enabling instant transfers, direct stimulus, and easier implementation of negative rates. Cross-border CBDC promises are overstated because a workable system would require too many bilateral corridors and agreements across 200+ currencies. Climate change increasingly belongs inside central-bank mandates because it affects inflation, output, employment, and financial stability now—not just in the distant future. Central banks already pick winners and losers through interest-rate policy and asset purchases, so using that power thoughtfully on climate may be defensible. The strongest near-term climate role for central banks may be financing retrofits and sustainable investment rather than trying to solve the entire problem alone. Taxonomy and greenwashing are real problems, but imperfect definitions should not prevent action; standards can improve over time. Fiscal authorities should still lead climate policy, but central banks may need to act because they are often the only institutions with operational capacity and timely tools.

Data Points: NGFS founding year: 2017 - Used to mark the start of the network for the greening of the financial system. Expected climate temperature rise without drastic change: At least 3°C - Megan summarizes the IPCC assessment as implying temperatures could rise by at least 3 degrees Celsius absent immediate action. Paris Agreement temperature goal: Below 2°C - The discussion references the 2015 Paris goal of limiting warming to under 2 degrees Celsius. Climate finance pledge by developed countries: $100 billion per year - Developed countries had agreed to provide this amount annually to emerging markets, but had not met the target. Companies fully complying with Bank of England disclosure guidance: About one-third - Green cites current voluntary climate-risk disclosure compliance rates. Companies partially complying with Bank of England disclosure guidance: Almost half - Shows broader but incomplete adoption of climate-risk disclosure standards. Bank of England disclosure deadline for publicly listed companies: By 2022 - By this year, listed firms were to be required to disclose climate risks. Bank of England disclosure deadline for privately held companies, asset managers, and insurers: By 2025 - Later extension of mandatory climate-risk disclosure rules. Climate report baseline year: 2013 - The UN climate reassessment was the first scientific review since 2013. Number of currencies requiring cross-border CBDC corridors: Over 200 - Green argues that making digital cross-border payments work would require bilateral agreements across more than 200 currencies.

Pivotal Quotes: "there's so many different issues we're trying to address with one thing" — Megan Green: Her core critique of CBDCs: one instrument is being asked to solve too many unrelated problems. "This is a veritable laundry list of things that we're trying to address with one tool and one tool only." — Megan Green: She summarizes her concern that CBDCs are overburdened with conflicting policy goals. "climate change really threatens central bank's core mandate" — Megan Green: Her argument that climate now belongs within price-stability and employment considerations, not just financial supervision.

Implications: Listeners should expect CBDC adoption to remain slow and contested because of tradeoffs among privacy, banking stability, and policy goals. On climate, central banks may increasingly justify action through existing mandates, especially via disclosure, stress tests, and green financing tools.