Health Minister Kim Hames has slammed a union representing hospital staff for making "inflammatory comments" that are misleading to its members.
About 80 hospital support staff at Sir Charles Gairdner Hospital, including cleaners and caterers, walked off the job on Thursday to protest potential job losses.
The State Government has denied reports that patients could be affected by the loss of up to 500 jobs at the hospital.
But the United Voice union said their members wanted answers, after claiming the request for a meeting with Dr Hames was ignored.
The minister admitted the union had requested a meeting with him, but said he suggested they meet with the health service director because he was co-ordinating the changes.
"I'm not the one who employs staff," he told reporters.
Dr Hames said it was frustrating to deal with United Voice when they were making inaccurate statements to the media, such as suggesting that staff could wake up one morning and find they had lost their job.
"This union has a long history of inflammatory comments, of deceiving their members and taking unnecessary strike action," he said.
Dr Hames said no one would be sacked, insisting people would either not have their contracts renewed or they would be deployed elsewhere.
He said patient demand was up 2.5 per cent while employment went up more than 7.5 per cent, so staff had to move to where they were most needed.Workers who attended the stop-work meeting signed a joint letter demanding the minister come clean on the job cuts and meet with them.