LONDON – Everyone knows Keynes’ witticism, making fun of the economics profession’s ability to take the long, long view, no matter how much suffering there may be on the way. “In the long run we are all dead”, the world’s greatest economist sagely observed. Less well known are the arguments that come from his path breaking book, “The General Theory of Employment, Interest and Money”, written in midst of the Great Depression of the 1930s. One of the most important is that while in a time of recession it might seem good for individuals to save against a rainy day, it is bad for rescuing the national economy. What is needed is a fiscal stimulus from the mass of consumers spending almost up to their last penny. It has been the fashion since Keynes died for many economists to deride him – not least the school of monetarists led by...