Ministers' pension contributions are being pushed up by hundreds of pounds a year to share the pain of the public sector.

David Cameron, his Cabinet and Ed Miliband face paying 1.2 percentage points more of their salaries into the retirement schemes.

Ministers of state will have to pay an extra 0.8 percentage points from April, while more junior government members will see a 0.5 percentage point increase.

Cabinet Office minister Francis Maude has said: "The Ministerial Pension Scheme was not covered by Lord Hutton's recommendations, but I consider it appropriate that its members face similar changes."