In recent years some euro zone countries have sought to rein in temporary contracts to promote stable jobs.
It also plans to reduce the labour tax costs to employers of temporary contracts, which were raised in 2018.
The reform reversed the easy hire-and-fire regime put in place after the sovereign debt crisis a decade ago by abolishing most forms of temporary contracts.
Within that total, the number of temporary workers has jumped by 25% from 2.4 million to 3.0 million.
Stable contracts should be the norm, not the exception," she said.