GP co-payment not dead: Hockey Treasurer Joe Hockey insists the government will take its $7 GP co-payment to parliament. Senior ministers on Thursday attempted to hose suggestions it would be dumped, but only succeeded in fanning speculation the coalition may try to introduce the measure without parliamentary approval. Health Minister Peter Dutton, who earlier this week ruled that option out, said the government was now "exploring all options" to make Medicare sustainable. However, Mr Hockey said the government would press ahead with legislation. "We intend to take it to the parliament," he said, adding the policy would stand. But he would not say if legislation would be introduced before parliament rises for the long summer break next week. "We will take it when we are able to take it," he said. There's a lot of work before the parliament at the moment. Outspoken Liberal senator Ian Macdonald said the co-payment should be dropped, hinting that he might cross the floor if the government persists with its plan. "I've indicated to the prime minister and others and to the party room that I will be opposing it should it come forward in its present position," he told Sky News. The government announced the co-payment in the May budget, even though it's not due to start until July 2015. Labor, the Australian Greens and crossbenchers oppose the measure. The opposition seized on the apparent confusion in government ranks. Leader Bill Shorten said Mr Abbott clearly remained committed to the co-payment, and could introduce it via regulations. The Palmer United Party called for the government to move on from the "nasty" co-payment. "Because it's not going to get up," Senate leader Glenn Lazarus told reporters. Parliamentary secretary Josh Frydenberg dismissed suggestions the government was dumping the plan simply because it was unpopular with voters. "We don't seek to win a popularity contest," he said.