"The government has ignored the need to address the extra extreme workloads nurses and midwives are juggling," NSW Nurses and Midwives' Association General Secretary Shaye Candish said.

"We asked for one extra nurse every evening and night shift in remote sites, and the government has said no to this request".

More than 70 union branches have voted to stop work for various hours ranging from two to 24 hours on June 28.

Members will participate in a mass meeting at Sydney Town Hall.

The government injected a record $33 billion into the health system on Tuesday with $1.76 billion allocated to NSW Ambulance to recruit 2128 new staff and almost $3 billion for mental health services.

The nurses' union decision comes a day after some 85,000 school teachers said they would strike next week over pay issues.

Premier Dominic Perrottet has already flagged that public sector workers can expect a three per cent wage rise in the budget this year but various unions have labelled it as a wage cut with inflation soaring.

On Tuesday, private and public sector union members rallied outside parliament to protest against the government's wages policy, saying it will leave workers worse off with ballooning prices.

It coincided with Treasurer Matt Kean handing down his first budget.

Australian Associated Press