Not the police, as it is one the most unionized group of public servant workers in France, the biggest police union is called alliance, which is considered to be affiliated with the far right, and their spokespersons go bitching on tv like little crybabies every chance they get. The only group not allowed to unionized in France is historically military personnel, so maybe you’re thinking of the gendarmerie who are military and not cops even if most of what they do is cop things.