The BBC has learnt that there are growing concerns in government about the fairness as well as the affordability of the Dilnot proposals for funding social care.
Lord Warner, who was on the Dilnot Commission, told the Today programme that social care reform was "drifting".
If nothing is done, he warned, residents in state-funded homes will end up not receiving services.
Conservative MP Matthew Hancock told the Today programme that there is little cross-party antagonism over the issue as everybody has agreed that it is "vital to end the lottery on social care".
He told the Today programme that the government is "moving towards a solution" but "it is vital the consensus includes how the money is spent and where it comes from".
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