Frank Field has an idea.

Mrs Rigby has got a lot of time for Frank Field, she thinks he talks a lot of sense.

This is what he has to say about MP's allowances here

There is literally no obvious way out of the appalling mess in which MPs now find themselves over our allowances. The opportunities we have had - in deciding how to disclose information about our allowances - were squandered.

He suggests that Mr Brown should

... invite again the leaders of the other parties to join him in Downing Street. The purpose would be to agree an all party leadership recommendation to the Kelly Committee and they should not leave Downing Street until the outline of an agreement is made. If he doesn't, one of the other party leaders should take the lead.
They should then ask the Kelly Committee to speed up their enquiry. It should be asked to report on the second homes allowance within a month.

Mrs Rigby wonders if anybody will listen to his ideas.