This week saw a flurry of activity from central banks, with the US Federal Reserve, the European Central Bank and the Bank of England all increasing interest rates and giving their opinions on what to do next. It looks like 2022 is the year that the world called time on central bankers, revealing a disturbing lack of competence at the heart of our economic system. How the mighty have fallen. A central banker on a chat show is a new departure. In late October, Christine Lagarde, the head of the ECB, appeared on RTÉ's Late Late Show. When technocrats are…