MPs will vote later today on whether to freeze their pay for one year.
A government motion tabled by Sir George Young calls on the 650 MPs to accept the same rate of pay, a basic wage of £65,738.
It would mean they would give up a recommended 1 per cent pay rise.
Determined by the Senior Salaries Review Board, the rise would have taken MPs' pay to £66,395 from April this year.
From April 1 2012 responsibility for setting members' pay will be handed to the Independent Parliamentary Standards Authority (IPSA).
Labour MP John Mann has put forward an amendment demanding MPs listen to an independent body established to have the final say on setting pay.
At a meeting of the 1922 committee Tory MPs last December, Cameron told members: "There needs to be a better system in place by April or there will be change."
Next Saturday thousands of public sector workers are expected to descent on London to attend a TUC really opposing government cuts.
More than 100,000 people are expected to join the march, including people affected by cuts, to show that many reject the government's argument that there is no alternative.
The debate on MPs pay will follow a vote in the chamber on Brtain's involvement in enforcing a no-fly zone over Libya.


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