How much can I earn in my job?
The law does not determine how much you should earn if you fulfill a specific position. If a collective labor agreement applies, your employer must adhere to the job classification and corresponding salary scales of the relevant collective labor agreement. Doesn't a collective labor agreement apply? Then in principle you can negotiate with your employer about the amount of your wages. This so-called wage negotiation comes from two sides. You as an employee naturally have your requirements and wishes, but your employer has those too. The only thing your (potential) employer must observe is the legal minimum wage (WML).