More than half a century ago, in his role as an advisor to the men responsible for trying to set Taiwan on the road to prosperity, a redoubtable economist called Sho-Chie Tsiang argued that the monetary authorities should stop suppressing interest rates and directly rationing credit and should move instead toward a more market-oriented system where real rates were sufficiently elevated to encourage productive saving.
His reasoning was that the existing combination of what we might call Z(Real)IRP with ‘macro-prudential’ control was plagued with several significant drawbacks.