(Reuters) - Australia's government might fail to get the necessary backing for its planned A$1.55 billion ($1.45 billion) fund to pay big emitters to cut pollution, after a Senate minority party on Monday said it would vote against the plan. Mining billionaire Clive Palmer, whose Palmer United Party (PUP) will control the balance of power in the Senate from July, said he would not back the government's direct action Plan on climate change. "We can't see any reason to vote for direct action. We think it's hopeless," Palmer told Fairfax Media on Monday.