Just what does the Prime Minister have in mind when he talks about selling off our roads?
Well the answer is simple he says. We need more cash to rebuild our infrastructure and, in hard times, it is a good idea to raise that cash from the private sector.
But the history of private sector involvement in building projects has not always been a happy one. PFI projects often overran and cost the taxpayer dear.
David Cameron is said to admire his Tory predecessor, Harold Macmillan, but it was he who coined the phrase 'selling off the family silver' in his critique of Margaret Thatcher's privatisation programme.
Could this be a case of selling off the family concrete?