Unions have taken aim at the Queensland government which also introduced law changes that will tighten workers' access to psychological injury support.
Under the proposed reforms, Deputy Premier Jarrod Bleijie would be able to terminate protected industrial action in certain circumstances.
Mr Bleijie - who is the industrial relations minister - on Thursday said the powers essentially mimicked federal laws and would only be used in extraordinary situations.
However he cited earlier teacher strikes that occurred during school exam weeks as an example that would be considered for termination.
Under the changes, Mr Bleijie could terminate protected industrial action if he was satisfied it would endanger the population, cause significant state economy damage or was "contrary to the public interest".
The Queensland Council of Unions said it would strip public sector workers' bargaining rights and give Mr Bleijie sweeping powers.
"It's the work of a deputy premier drunk with power," it said in a statement.
The proposed changes were part of sweeping reforms introduced on Wednesday night following an independent review of the state's industrial relations laws.
The review's report made 104 recommendations, with 75 accepted in full by the state government.
Proposed changes also included workers' compensation scheme amendments that critics claimed would make it harder for frontline staff to get support.
Under the WorkCover changes, employees will need to show their job was the "major significant contributing factor" in a psychological injury claim.
Mr Bleijie said it brought Queensland into line with other states, claiming the proposed change would save small business $1.46 billion annually.
Psychological injury claims had increased by almost 268 per cent in the past decade and premiums were set to skyrocket by 26 per cent in the next five years without action, he said.
However the United Workers Union, which represents ambulance officers, described the changes as an "underhanded attack".
It removed rights of ambulance officers and other hospital workers to receive WorkCover despite being more likely to suffer from trauma and psychological injuries, it said.
"For the paramedic haunted by a horrific call-out, or the ambulance officer lying awake after a traumatic shift, she's been delivered a fresh battle just to get help," the union's state secretary Fiona Scanlon said.
"The changes to the test are nothing more than a bean-counter's attempt to wind back services for frontline health professionals who have experienced trauma and psychological injuries."
State opposition leader Steven Miles said the changes were "nothing less than an ideological attack on workers rights".
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