Nope. It was an optional complex system where organizations would sign deals to pay workers at least specific amounts if those workers are in particular fields.
Here is the thing. A major issue in Italy is “dark labor” (“lavoro a nero”), that essentially means working without signing a contract (so you are without any worker protection), making it not known to the state you are working and so evading taxes. In the current state adding minimum wage now adds a real chance to only fuel this terrible practice.