The state’s share of the GST has come under fire after the Productivity Commission released an interim report labelling the 2018 deal that guarantees WA a minimum return from every dollar raised as a “mistake”.

WA seems to have bagged a great deal, but it’s not quite that simple.

Roger Cook will use Anthony Albanese’s upcoming visit to seek assurances the state’s GST deal is safe after a blistering report branded it a “costly mistake”.