The Minister for Social Protection has admitted that the Government did not know the exact number of public servants retiring in February until last week.
It is widely expected that around 8,000 people will retire at the end of the month in order to receive their full pension.
During Leaders' Questions, Fianna Fáil's Finance Spokesperson Michael McGrath asked Joan Burton about the number of people retiring and about how much money would be saved as a result.
Minister Burton said Fianna Fáil should have full knowledge of the scheme, considering the plans for it were laid by the late Brian Lenihan, when he was Finance Minister.
She said that the Government did not know he exact number of public servants intending to leave until last week.
"What I didn't know as a Minister last week, and what the other Ministers in the Government didn't know, was we could anticipate what the numbers would be like, and we monitored them, generally speaking, weekly," she said.
"But we didn't know exact number until last week. So you ask for a full financial analysis - that's being done at the moment, we have the internal figures."