Used to work in a company where every salary was disclosed for all employees. There was a constant stream of people going to their boss "why aren't I getting what [$EMPLOYEE] is getting?". Most of them didn't like the answer, and the answer was not "[$EMPLOYEE] negotiated better". There were in fact clear milestones, competencies, responsibilities, and most significantly... for want of a better word... "campaign ribbons" that [$EMPLOYEE] had earned, that the eager junior would need to earn in order to get to that salary. Many of these decided they didn't want to acquire them.