Just how nasty are politicians expected to be? Maybe they need to look nastier than they really are, because the demos demands that they hang tough. Even so, voters baulk at politicians who go home and dismember effigies of opponents or torture kittens; indeed the public, at least as ventriloquised by the press, demands politicos not succumb to such common moral foibles as fibbing, graft and the wedlock-bucking hump. As the two demands clash, modern politicians find themselves flip-flopping between machismo and piety – which explains why, taken in the round, they often present as characterless vacuums. Thatcher’s and Blair’s premierships managed to strike both poses at once, in a tic that degenerated into self-caricature.