The Premier, Lara Giddings, has joined with her Labor colleagues in South Australia, the Northern Territory, and the ACT to oppose the Liberal Party's plans to strip GST funding from the smaller states.

Ms Giddings said Liberal Premiers from the largest mainland states outlined their plan while in Canberra for today's Council of Australian Governments meeting.

"This latest proposal from the Liberal Premiers has nothing to do with fairness or equity," she said.

"It's just typical Liberal Party policy to help the rich get richer at the expense of the smaller states.

"Under their latest cash grab, we could lose around half a billion dollars in annual GST funding.

"It's the equivalent of the combined loss of 800 doctors, 3000 nurses, 500 allied health professionals, and over 100 child protection staff."

Ms Giddings said Tasmanians could take little comfort from comments by Will Hodgman or Tony Abbott on the issue.

"You can't rip half a billion dollars in revenue out of our state and somehow claim that's fair," she said.

"Will Hodgman's claim that Tasmania would be no worse off under a Coalition Government was exposed as fraudulent the second Tony Abbott headed to Western Australia to repeat his claim that the current system of GST distribution was unfair.

"Clearly, the Federal Liberals are prepared to rip the heart out of our GST revenue while Will Hodgman sits mute on the sidelines.

"I believe this is not an acceptable outcome, and will continue to fight for the principles of fairness and equity that underpin the current distribution and ensure all states and territories receive their fair share."