Lawyers and backers of class action lawsuits have secured support from the Labor Party to attempt to overturn changes to litigation funding.
Concerned with the growing number of class action lawsuits, Federal Treasurer Josh Frydenberg tightened the screws on litigation funders earlier this year.
The changes require funders to hold a financial services licence, exposing them to stricter transparency and accountability measures.
Mr Frydenberg said the changes put financiers on a level pegging with those they helped wage court battles against.
But legal professionals fear David and Goliath-style struggles could be snuffed out by the regulatory squeeze.
Labor agrees and is seeking support from the Senate cross bench to have the regulations overturned.
"Labor will stand up for the rights of ordinary Australians seeking access to justice by moving to disallow the Morrison government's attempt to cripple class actions by regulation," shadow attorney-general Mark Dreyfus said on Tuesday.
"Litigation funding and class actions provide a vital path to justice for Australians trying to uphold their rights against wealthy defendants with vastly greater resources."
Mr Dreyfus said the regulations treated plaintiffs in class actions as if they were investors in managed investment schemes.
"They will make access to justice more expensive for ordinary Australians who have been harmed by misconduct by large companies or governments," he said.