The head of the civil service has said he cannot rule out compulsory redundancies to reduce staff numbers.
It is estimated that 490,000 public sector jobs could go over five years, due to spending cuts.
Sir Gus O'Donnell told MPs it could not be done just "through natural wastage" and compulsory redundancies "would be part of the answer".
He said departments were still working out what new spending limits, unveiled last week, would mean for jobs.