The conservative-majority Supreme Court announced Monday it will not hear several cases that aimed to make public sector unions reimburse fees they collected from non-union government workers before 2018, when the "fare share" fees were declared illegal.

The decision to sideline the bloc of cases suggests most of the Supreme Court justices believe the court has done enough to prevent the collection of the so-called agency fees, Vox reported.

In the 2018 case, Janus v. American Federation of State, County, and Municipal Employees, the Supreme Court held that public sector unions cannot charge non-union members for services they enjoy as a result of union contract negotiations.

States with right-to-work laws already prohibit such agency fees.

Monday's collection of new cases all involved plaintiffs that wanted to be reimbursed for the agency fees that had been levied before the 2018 high-court decision, Vox reported.

But lower courts have mostly rejected the reimbursement attempt, Vox reported.

The high court's decision not to delve into the reimbursement issue could give the public sector unions a victory, at least temporarily, Vox reported.

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