I think that the politicians have lost track of what is actually meant by trust. When a member of the public says "I don't trust politicians," he isn't talking about sleeping with his neighbour's wife or fiddling expenses. He's talking about the fundamental problem that politicians are not seen to be acting in the interests of the people whom they purport to represent. I don't trust a politician to act in my interest, to respond to a letter I write with more than lip service, or to keep a campaign promise; and I don't think any expenses-related purges are going to restore that trust in a hurry. It's going to take more.