“The interesting thing to me is how still, particularly in America, the world is sharply divided between those who believe that through fiscal policy…you can interfere with an economy in order to get it out of the doldrums, and…the Tea Party movement…who came to their own view instinctively that this was a very bad thing to do,” says Nicholas Wapshott, author of Keynes Hayek: The Clash that Defined Modern Economics.