In all (most?) European countries we have a lot of protections exactly due to this. Minimum wage, minimum holidays, max working hours, minimum break times, paid sick leave. Employers would starve employees if oversupply of workers and governments would let them.
Funnily enough, by not recognising sex work as a job, sex workers actually lack these protections in many European countries.
Furthermore, in Nordic countries, minimum wage and such are not government-mandated, but maintained by collective bargaining agreements negotiated by powerful unions. In Norway, Sweden, Denmark, Finland, and also Italy, there is no legally defined minimum wage.
