New FOI documents uncover pay mistakes among senior and retired officials.
An Offaly auctioneer says underpaid tax by senior civil servants 'cannot be swept under the carpet.'
It comes as the Government plans to foot the bill from the budget of the National Shared Services Office.
New internal records released under a Freedom of Information Act shows miscalculations had been made on salaries and payments for ministers and retired public service workers.
The final cost to be covered will amount to millions of euro.
John McCann of MCM Accounting in Tullamore says equal payments are needed:
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