European Central Bank president Jean-Claude Trichet rounded on speculation in some quarters that Ireland may default on its national debt burden, dismissing such claims as "absurd".

The boost came as Finance Minister Brian Lenihan signalled taxpayers could foot the bill for a multi-billion euro "toxic land bank" to ease pressure on debt-laden financial institutions.

Mr Trichet, in Dublin to address the Institute of International and European Affairs, said while Ireland faced "very challenging times" the Government was "acting resolutely to address the situation".

He was "optimistic" about Ireland and predicted the country will emerge strongly from the recession, but warned pay cuts may be needed to restore competitiveness.

Floating the idea of "sequestering" bad property portfolios from banks, Mr Lenihan warned Ireland’s financial debt exposure was heavily weighted towards construction.

"I believe that the Irish impaired assets are, by and large, related to property. If there was some way of sequestering them, or putting them in a separate place, it might be possible to create a property company which wouldn’t operate as a bank but which could be capitalised and be an attractive investment in due course," he told the Oireachtas finance committee.

Labour’s finance spokeswoman Joan Burton insisted such a "toxic estate agency" should not be used to "give developers an easy ride at taxpayers’ expense".

The minister defended the controversial appointment of internal candidate Richie Boucher to be the head of Bank of Ireland, but came under heavy opposition for suggesting outside applicants may have been put off over fears that pay would not be high enough due to control by a government committee.