Special advisers to Labour ministers received pay-offs worth £1.8 million after the general election.
The generous severance packages were disclosed as the Government published details of the cost of so-called "Spads" to the taxpayer.
The figures show that David Cameron is employing fewer advisers than Gordon Brown did as Prime Minister.
At the beginning of 2009-10 Mr Brown had 23, while the Tory leader has 19 on his staff.
However, Deputy Prime Minister Nick Clegg has five - meaning the total for Downing Street as a whole is slightly higher than previously.
The highest earners are Number 10 director of communications Andy Coulson, on £140,000 a year, and Mr Cameron's chief of staff Ed Llewellyn on £125,000.
Altogether the public is said to be paying £4.9 million for Government Spads this year, some £700,000 below the sum declared under Labour last year.