The Opposition called for Troy Buswell's sacking as Treasurer yesterday in a parliamentary motion that was voted down along party lines.
Opposition Leader Mark McGowan said Mr Buswell deserved to lose his job after presiding over the loss of the State's AAA credit rating for the first time since 1991.
Shadow treasurer Ben Wyatt said the Government had enjoyed "massive revenue increases" since it came to power, including mining royalties up 246 per cent, payroll tax up 92 per cent, revenue from government corporations up 51 per cent and total State revenue up 44 per cent.
"Isn't it true you have been the Treasurer at a time of prosperous economic growth after inheriting the best set of books in the country," Mr Wyatt asked.
Mr Buswell agreed it was true but said the Government also had to deal with record population and economic growth.
"Every single cent of that debt (increase) has gone into delivering infrastructure for the people of this State - infrastructure to service a growing population and infrastructure to service a growing economy," he said.
Mr Buswell then taunted the Opposition during question time, saying: "What is your alternate plan? Nothing, absolutely nothing."
He said the credit downgrade was a serious issue for the Government but also for Western Australians."To the broader community the level of services, the level of infrastructure that you have perhaps received in the past, are not necessarily sustainable moving into the future," Mr Buswell said.