Premier Mark McGowan is backing a group of prominent West Australian businessmen who plan to travel to Canberra in an attempt to further pressure the prime minister to change the GST carve up.
The business leaders include mining billionaire Andrew "Twiggy" Forrest, Wesfarmers and Woodside chairman Michael Chaney, property mogul Nigel Satterley and investment banker John Poynton.
In the latest distribution by the Commonwealth Grants Commission, WA will get only 34.4 cents in the dollar in 2017/18, up from a record low of 30 cents.
Mr McGowan said the businessmen would get a full briefing from WA treasurer Ben Wyatt and treasury before flying to Canberra.
"It's terrific, I'm very pleased that those four men have decided to do this ... I give them every encouragement and every support in what they're doing," Mr McGowan told reporters on Sunday.
The premier said he also encouraged them to talk to Labor leader Bill Shorten, but reiterated that the decision-making power was in the hands of Prime Minister Malcolm Turnbull, who was facing a backlash from voters at the next federal election.
"To all federal parliamentarians, whoever is in government at a federal level, is going to have to deal with this at some point in time because whoever the government is nationally is going to be punished for the existing situation," he said.
"I'd say to Mr Turnbull you're in big trouble in Western Australia. You need to deal with this issue as soon as possible in your own interests as well as in the national interest."
The premier was earlier on Sky News describing the GST issue as a "powder keg underwritten by dynamite with a burning fuse".
