Real Interest Rates and Fiscal Prudence

Real interest rates are inherently volatile and prone to mean reversion, challenging the long-held academic consensus that rates would remain permanently low. Ken Rogoff, former chief economist at the IMF and Harvard professor, argues that the professional reliance on models predicting perpetual low rates and debt sustainability was both scientifically flawed and politically influenced. Policymakers must adopt greater humility, as historical data shows that real interest rates fluctuate significantly, and rising debt-to-GDP ratios create substantial risks for advanced economies. Rather than viewing technological advancements like AI as a panacea, the current economic trajectory suggests that mounting debt servicing costs and political inaction are likely to culminate in a future crisis. Robust policymaking requires preparing for economic shocks rather than relying on optimistic, static theories that fail to account for historical reality.