If you want to see corruption, look at the party leaders’ response to the scandal

Which of the many MPs accused of defrauding the taxpayer by fiddling their expenses is the worst offender, do you think? We need some clarity on this issue. In the public mind I have a feeling that they are all beginning to merge as one composite beast drawn from ancient mythology — a hydra-headed pig emerging from its second duck island with a tampon in one claw and a porno flick in the other, whining piteously about inadvertent accountancy errors. How should we choose between them? Clearly, some have behaved worse than others. Some have cheerfully gone along with a corrupt system to trouser a few extra quid here or there — others have told lies, cheated and employed accountants to screw thousands upon thousands of pounds from the rest of us.

My own nomination as worst offender is the Work and Pensions Secretary, James Purnell. He told the parliamentary authorities that his main home was in Manchester, so that he could claim a second home allowance for his pad in London.