I don't tell my coworker how much I'm paid because he's a level below me and desperate to get promoted, but doesn't have much of a spine - he'll ask me to ask my boss if he can do things, for instance, instead of asking her himself. His desperation to get promoted is already off-putting but his clear inability to stand up enough for himself nixxed it in my book. I have no interest in dealing with petty jealousy especially if you are unable to prove that you are worthy of being promoted. It is not my problem that I am younger, and (on paper in this realm only) more successful. I think in large corporations some amount of transparency has come into the equation when you talk about "pay grades" and "if you're in this position you will make this range." It is better than starting from 0. Of course, it is also a long way off from solid numbers.