Minister Michael McGrath has denied any knowledge of Fianna Fáil trying to stop a pay increase for super junior ministers in 2017.
That is despite statements on the Fianna Fáil website from the time saying the party would block any attempt at a salary top-up for then-Minister Mary Mitchell O'Connor.
This week the party approved such a top up for its own government, meaning all three super junior ministers will get a €16,000 pay rise.
But when pressed on it Public Expenditure Minister Michael McGrath said he does not remember Fianna Fáil trying to block the same move by Fine Gael a few years ago.
Mr McGrath said: "That issue was certainly never raised with me. To be straight you are referring to a background I am certainly not familiar with.
"It was certainly not discussed and to the best of my knowledge there was no proposal ever put before the Oireachtas
"We're in a situation now where three Ministers of State attending Cabinet, two can currently get the allowance, I personally think it is fair that the three are treated equally."
The Minister for Public Expenditure and Reform was speaking as the government gave a briefing on tax proposals in the July stimulus package.
Finance minister Paschal Donohoe said the government's July stimulus package was worth €1,000 for every Irish citizen and is a "timely" plan to help rescue sectors.
It included a surprise cut to the Vat rate from 23% to 21%, designed to motivate spend and boost business.
Outlining elements of the €5bn spending plan, he also said the deal would help farmers, house buyers and consumers, as well as businesses.