Jonathan Isaby from the TaxPayers' Alliance said taxpayers would "resent" paying for spare rooms for those receiving housing benefits "when they can't have one themselves."
He said: "I'm not saying that there aren't people who do need those rooms but you can't have a blanket exemption for hundreds and thousands of people."
Campaigners against the Government's so-called 'bedroom tax' will take to the streets tomorrow in protest of the proposals.
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A 20-year-old man who died in a triple stabbing outside Parsons Green Tube station has been named by police.
Capable of crossing the Atlantic in under three hours, Concorde flew at over twice the speed of sound, reaching altitudes of 60,000ft.
The announcement is part of a £500 million cost-cutting drive which will take place over three years.