DISABILITY advocates and welfare groups want the federal government and the opposition to pass legislation to help pay for a national care scheme sooner rather than later. But the prospects are slim of Labor introducing the relevant amendments to raise the Medicare levy to two per cent, from 1.5 per cent, before the September national election. This means the task will be left to the next government, which could be a coalition one, to establish the funding measure before the proposed start date in July next year. People With Disability Australia spokesman Craig Wallace said the levy measure would give longer term certainty to more than 400,000 people with disabilities, their families and carers. "It locks it in, it makes it perpetual and actually means there's a secure underpinning of the scheme," he told reporters in Canberra on Wednesday. Australian Medical Association president Steve Hambleton said Labor's plan would give certainty to disabled Australians who had had a "raw deal" over many decades. The Australian Council of Social Service (ACOSS) agrees, saying the levy proposal is an investment in an important piece of social infrastructure. While the Queensland Liberal National Party government immediately it would support a Medicare levy rise - even though it would only raise half the money needed to get the scheme to full operation - Western Australia remained sceptical. "I will not sign up for a scheme that is not even funded," WA Liberal Premier Colin Barnett told ABC radio. The PM is assuming the rest of the money is going to come from the states, but what capacity do the states have to increase a tax to pay for our share? Queensland Premier Campbell Newman, who was briefed by Ms Gillard on Wednesday morning, said the scheme had to paid for somehow. "I think we need to at least support this," he said. The ACT minority Labor government also gave its support, while Victoria wants more time to examine the proposed funding model.