"Most people would find it pretty extraordinary that [IPSA] would be recommending a large rise for MPs at a time when living standards in this country are under pressure," Chief Secretary to the Treasury Danny Alexander told ITV News.
"I would still appeal to IPSA even at this late stage to recognise that the economic climate - the climate of pay for people in the public sector particularly - is one of continuing restraint and that same principle should be applied to MPs," he said.
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Arthur Simpson-Kent, 48, admitted killing Ms Blake and their sons according to his lawyer.
Two brothers have been arrested on suspicion of murder after their parents were found dead in their own home over the weekend.
The first man to be convicted of murder on the basis of DNA evidence should be moved to an open prison, according to the Parole Board.