I'd say that preventing potential employers from asking questions about salary while allowing applicants to ask whatever they want is creating, not removing, as

I'd say that preventing potential employers from asking questions about salary while allowing applicants to ask whatever they want is creating, not removing, assymmetry. In both cases, parties are free to refuse to answer questions. One could argue that the potential employer is in a position of power and should therefore be constrained but I don't see that as the case at all these days, at least not in the tech industry.