So far, the Lib Dems have led on the issue of second homes, calling for the second home allowance to be abolished for London MPs. But much, much more needs to be done to restore people's faith in the political class. On that front, Tim Montgomerie's right that David Cameron should start pushing for cuts in MPs' and ministers' pay. The Tory leader might face some opposition from his colleagues, but he'd have the public right behind him.
P.S. Iain Martin has his say on the Pickles debacle over at Three Line Whip: "Tories should put Eric Pickles under house arrest".