A Labor state leader has backed WA Premier Colin Barnett's call for a national conversation about possible changes to the GST.
ACT Chief Minister Katy Gallagher doesn't yet have a position on whether the tax's rate should be changed, but she says the country at least should be able to talk about it.
"The problem is the commonwealth has to take all the political heat on it and then distribute the money to the states," she told ABC radio.
"If there is to be any rational discussion about the GST, all states and territories need to back in any federal government that's prepared to examine and look at whether the rate does need to go up or exemptions need to change."
Mr Barnett on Thursday called for Prime Minister Tony Abbott to take some leadership and look at increasing the GST.
