A long-standing Bunnings employment dispute is heading to the Employment Relations Authority, the employees' union says.

The IRS employees' union pushed back on Werfel's announcement and said it will keep negotiating the bonus issue.

The socialists have already captured the Western Federation of Miners, the Western Hotel and Restaurant Employees' Union, and the Patternmakers' National Association.

Macdonald also asked Ms Berejiklian to address a claim from the Fire Brigade Employees' Union that the NSW government had cut funding to firefighting services.