The Greens have backed a union campaign to reform Australia's industrial laws in ways designed to benefit workers.
The ACTU's nationwide "change the rules" campaign is designed to boost job security and secure pay rises that "keep up with rising company profits and the cost of living", the union says.
Greens members, at the national conference in Brisbane on Saturday, followed party leader Richard Di Natale's call to support the campaign.
Mr Di Natale said Australia needed a new industrial relations system that allowed workers to bargain collectively.
"If you're an ordinary working person in this country you're faced with stagnant wages, job insecurity, times are pretty tough for people on low-to-middle incomes," he said.
The unions drew tens of thousands of people together last week for a rally that shut down parts of Melbourne's CBD.
The party's Industrial relations spokesman and Melbourne MP Adam Bandt said Australia was one of the worst countries when it came to insecure work.
"Something's wrong ... when we've got teachers being put on short-term contracts, where we've got workers at university, working there for years at a time without being entitled to one day's sick leave because they're on permanent casual," he said.
"The rules have got to change."
Mr Bandt also supported people's right to strike.
"The one thing that distinguishes the modern economy from slavery is that you're free to say: 'look I actually don't want to work for you'," he said.
"We don't comply with international law when it comes to our treatment of refugees.
"We also don't comply with international law when it comes to upholding people's rights, including the right to bargain and the right to, yes, take industrial action if you're not able to achieve an outcome by other means."
Australian Associated Press