WA stares down 'east coast clowns' over costly GST deal

WA Premier Roger Cook has taken aim at a GST report and at other premiers who want changes. (Richard Wainwright/AAP PHOTOS)

Australian taxpayers are paying more than $6 billion a year to top up Western Australia's overflowing coffers because of a "perverse" Morrison-era deal, a scathing report has found.

The Productivity Commission recommended scrapping the "costly" 2018 GST deal, which the federal budget projects will send $60 billion across the Nullarbor by the end of the decade.