Casual workers will need to have at least a 12-month link with one employer to be eligible for the government’s coronavirus wage subsidy program.

Industrial Relations Minister Christian Porter has ruled out broadening the scope of the $130 billion scheme, which will see eligible workers receive $1500 each fortnight.

“The fundamental principle is that you get it if you’re a casual, if you’ve had a connection with your employer for that period of time,” he told ABC radio on Monday.