The Economist Party is beginning to squawk a little bit about Mark Carney’s entry into electoral politics, which may be announced by the time you read this. The former boss of the central banks of Canada and the United Kingdom is said to be considering a run for the leadership of the Liberal Party, and will have lots of help from the inner circle of Justin Trudeau, assuming that this is the kind of help that ends up, y’know, helping. Carney has been talked about as a potential saviour of the Liberals for years, yet it seems we are only getting around to asking a basic question: is this at all a good idea?