In 1932, Hayek suggested that private investment in the public markets was a better road to wealth and economic co-ordination in Britain than government spending programs, as argued in an exchange of letters with John Maynard Keynes, co-signed with Lionel Robbins and others in The Times. The nearly decade long deflationary depression in Britain dating from Churchill's decision in 1925 to return Britain to the gold standard at the old pre-war, pre-inflationary par was the public policy backdrop for Hayek's dissenting engagement with Keynes over British monetary and fiscal policy. Well beyond that single public conflict, regarding the economics of extending the length of production to the economics of labour inputs, Hayek and Keynes disagreed on many essential economics matters. Their economic disagreements were both practical and fundamental in nature. Keynes called Hayek's book, Prices and Production, "one of the most frightful muddles I have ever read", famously adding, "It is an extraordinary Example of how, starting with a mistake, a remorseless logician can end in Bedlam." Many other notable economists have also been staunch critics of Hayek, including John Kenneth Galbraith and later, Paul Krugman, who wrote: "the Hayek thing is almost entirely about politics rather than economics".