WA Treasurer Rita Saffioti has fired yet another GST warning shot at opponents of the GST deal that has blown the federal government’s books by a further $12 billion – urging them to read about the state’s other contributions to the budget.

The federal budget has revealed the guarantee holding the Coalition government’s 2018 GST formula change together had blown out from $39.2 billion to $52.9 billion.

That extraordinary figure is the cost of the guarantee paid to other states to ensure they are not worse off with a 70 to 75 cents in the dollar floor introduced in the GST share.

The deal has seen WA’s GST revenue rise from 30 cents in the dollar in 2018 to 75 cents in the dollar at the same time its iron ore royalty revenues skyrocket.

The state’s swollen coffers have drawn the ire of the deal’s opponents like economist Chris Richardson and Saul Eslake and other state treasurers who either want the floor scrapped, a change to a per capita model or indefinite continuation of the no worse off guarantee.

Richardson tweeted the most recent figures with the comment “read it and weep”, pointing out that the cost of the guarantee was higher than the Future Made in Australia strategy.

During a press conference in Perth this morning, Saffioti fired back, saying opponents only read one part of the budget and ignored the billion in extra company tax revenue poured into federal coffers from the state’s booming resources sector.

“We’ve had the strongest consumption last year than all the other states, our company tax revenue from WA I think has doubled over the past five years, royalty income is going in there,” she said.

“They should go and read the other parts of the budget where WA revenues are propping up much of the revenue that’s coming into the federal government

”So don’t just look at what WA is getting. Look at what WA is giving, and we’re giving, far more than we getting.”