No it's not. In France companies pay ~1.5-2x gross salary in total, gross going to the employee ( some of it getting deducted by the state), rest going for health insurance, taxes, etc.
If you check the actual numbers here - https://entreprise.pole-emploi.fr/cout-salarie/ you'll see that for e.g. 30k€ gross yearly, a company shells out 41k, which is definitely not 1.5-2x total and still very far from the 75k mentioned above