You do realize for markets to be efficient (including labor markets), it is a prerequisite that all parties have equal information. If your employer is the onl

You do realize for markets to be efficient (including labor markets), it is a prerequisite that all parties have equal information. If your employer is the only one that knows what everyone is making, and you aren't allowed to discuss salary (which is at best taboo, and at worst a fireable offense at some companies), than you are at a disadvantage when you go to negotiate with them.