Palmer United Party Senator Dio Wang will demand Joe Hockey give WA a bigger slice of GST payments but admits he has no ideas for how that would be achieved.
The push comes as State Liberals begin applying pressure on Federal counterparts to take the campaign for GST reform to Canberra.
Senator Wang, who will meet Mr Hockey in Perth today, said getting the State a bigger share of GST was his first order of business with the Treasurer.
But Senator Wang had nothing to offer Mr Hockey as to how the complicated system of GST payments could be reformed. "In terms of how that happens, I am not in Government so I will leave that to the Government," Senator Wang said.
Mr Hockey has been travelling the nation meeting independent senators and members of Clive Palmer's party as part of a charm offensive.
State Liberals are becoming vocal on the need for GST reform, pointing out WA will soon get back just 11Â¢ from every dollar.
WA Liberal Senator Dean Smith said State Liberals would call for a "unity ticket" with Federal Liberals to campaign on GST reform.
"No issue is more important to WA's future prosperity," he said.
Pearce MP Christian Porter yesterday hailed as "very significant" Defence Minister David Johnston's description over the weekend of the GST carve-up as a "scandal".
Senator Johnston's remarks to the WA Liberal State conference at the weekend was the first time an Abbott Cabinet member had directly called for change.
"The outrage of the numbers and the destination of our hard-earned revenue to other States and territories is a scandal that only we really understand and are prepared to fight for," he said.
Mr Porter, the former WA treasurer who quit State politics to argue from Canberra for more GST, said he was encouraged by the remarks but was unsure whether they would yield results.