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The Abbott government has raised the stakes in its bid to terminate the carbon tax and mining tax, warning incoming senators that they may be kept in Canberra until the government gets the result it wants.
Coalition leader in the Senate, Eric Abetz, has written to the new crossbenchers flagging that the fortnight of sitting days from July 7 could be expanded to deal with its most important package of bills.
''I flag to you that to ensure passage of this legislation, the government may move to sit on additional days,'' the letter from Senator Abetz states.
One incoming senator said: ''The message seems to be that we will keep you voting until you get it right.''
The government has already injected an extra fortnight into Parliament's sitting schedule so that it can deal with Prime Minister Tony Abbott's ''pledge in blood'' to axe the carbon tax.
On Tuesday, the government gagged debate on the carbon tax repeal bills in order to rush them through the House of Representatives and have them considered by the Senate from July 7.
Incoming senators, who cannot pay staff until July 1, will also have to deliver inaugural speeches as well as understand the repeal legislation.
Independent senator Nick Xenophon said it was an unreasonable time frame for such an important vote.
He told The Guardian that ''the safest course'' was to delay consideration of the carbon tax repeal until senators with the balance of power understand the Emissions Reduction Fund, the centrepiece of Environment Minister Greg Hunt's Direct Action plan.
NSW senator-elect David Leyonhjelm, of the Liberal Democratic Party, said he was ready to vote to end both taxes.
''The carbon tax and the mining tax I feel comfortable about dealing with,'' he said.
Bob Day of Family First, representing South Australia, has pledged to vote with Mr Leyonhjelm on economic issues such as the tax repeal.
Clive Palmer, who is expected to vote to repeal the carbon tax, is due to announce his party's final position at 7pm on Wednesday.