The increasingly alarmist commentator Niall Ferguson was at it again the Financial Times (July 20, 2010) in his article – Have Keynesians learnt nothing?. The article has a simple presumption – we are getting scared of deficits and as a result inflation is inevitable. What? We are scared because we expect there will be inflation and so we will act accordingly and start pushing up wages and prices to defend ourselves in real terms. The result will be inflation. This is a playback of the so-called rational expectations literature which Ferguson proudly cites as his authority. The problem is that the theory is defunct – it never was valid and only a butt of depressed cultists still hang on to it as their religion because they learned it when they were young and in doing so lost their capacity to experience the joys of wider education. We really must feel sorry for them.