Shortly after its re-assumption as the new Australian government, the Labor Party is now parrying accusations of reneging from a deal forged with independent MPs that enabled the party to finally take the country's leadership, following almost two weeks of uncertainties and speculations.

Throwing his support behind Labor, independent MP Tony Windsor was all convinced that the new government had agreed to organise a comprehensive tax summit that will discuss and study the suggestions contained in the Henry Tax Review released earlier this year.

Mr Windsor has clearly indicated that the proposed mining tax must be included in the agenda of the tax summit, which was quickly denied by Labor leaders, leaving the independent MP dumbfounded and only managing to utter, "that was the first time I've heard of that," when queried on Radio National.

He vowed taking up the issue with Federal Treasurer Wayne Swan as he stressed that his whole understanding was "it was going to be included in any discussions in relation to taxation and the Henry Review."

And the opposition was quick enough to make play of the brewing situation, with opposition frontbencher Christopher Pyne flatly stating that the government was not serious enough when it wooed and won the independent MPs backings.

Mr Pyne gave indications that the MPs may have erred in supporting Labor as he suggested that the government is now backing away from 'commitments' made during the negotiations process, telling the Radio National that "because they are supporting the wrong party there's very little they can do about it."

However, Mr Swan clarified that the new government is committed to the tax as he gave assurance that the independent MPs could always come forward and discuss elements of the legislation that concern them.

He said that a committee has been established with former BHP Billiton head Don Argus acting as its chair as he stressed that Mr Windsor and his fellow independent MPs "will have views about the design of that tax which they can express to the government but we have to move forward with legislation."