You attempt to find the information before the interview, but some people don't. The downside is that the employer would also have to pay those other people a m

You attempt to find the information before the interview, but some people don't. The downside is that the employer would also have to pay those other people a market salary. EDIT: I don't see a downside for an employee. If they don't like the advertised range, they can try to negotiate regardless.