Midland MPs are backing strike action by House of Commons staff which will force them to clean their own offices.
Cleaners working in the Houses of Parliament are to go on strike for the first time ever next week, in a dispute over low pay.
They are particularly angry about a two-tier system which means some workers get more than others for doing the same job. The 170 staff employed by two agencies, Emprise Services and Mitie Cleaning, earn just £5 an hour, with no sick pay or pension and just 12 days holiday a year.
However, workers employed directly by Parliament earn £8 an hour with sick pay, a full pension, and six weeks' holiday. In contrast, MPs chosen to chair influential Commons committees are to be awarded up to £13,107 extra a year on top of their MP's wage of £59,095.
Midland MP Peter Luff (Con Mid Worcestershire) was appointed chair of the Trade and Industry Committee, while Sir Patrick Cormack (Con Staffordshire South) is the new chair of the Northern Ireland committee.
The pay bonus was approved by the House of Commons yesterday.
Black Country MP David Winnick (Lab Walsall North) is among those backing the cleaners.
Speaking in the Commons, he said: "This is totally unacceptable. We really need to treat people properly, those who clean up after us."
And a Commons motion insisting "the time has come to end this sorry state of affairs" has been signed by 122 MPs.
The motion calls on Parliamentary authorities "to reach agreement with the two contractors on making available the necessary resources to ensure that cleaners earn the London living wage".
The Transport and General Workers Union is demanding pay of £6.70 per hour, 20 days holiday on top of eight bank holidays, sick pay and a company pension.
Jack Dromey, T&G deputy general secretary, said: "The cleaners will wait no longer for justice. Parliament should be ashamed of poverty pay in the home of democracy.
"Tony Blair was right when he spoke last year about respect at work for cleaners and other low paid workers."
It follows a ballot in which T&G workers in the Commons voted 100 per cent in favour of strike action.
MPs to come out publicly in support of the cleaners include Lynne Jones (Lab Selly Oak), Paul Keetch (Lab Hereford), John Hemming (Lib Dem Yardley), Ian Austin (Lab Dudley North), Rob Marris (Lab Wolverhampton South West), Lynda Waltho (Lab Stourbridge), Ken Purchase (Lab Wolverhampton North East), Lorely Burt (Lib Dem Solihull), Clare Short (Lab Ladywood), Joan Walley (Lab Stoke North), Mark Pritchard (Con The Wrekin)