What are you talking about? Salary for equivalent positions is only tenuously connected to performance. The only people who benefit from salary secrecy are employers, and they benefit greatly.
>Salary for equivalent positions is only tenuously connected to performance.
But it's often supposed to be, and so salary differences can hurt feelings just as much as if the correlation was perfect. Or they can hurt feelings because the actual reason for the difference is unfair.
>The only people who benefit from salary secrecy are employers, and they benefit greatly.
Is that always the case? Remember, in this scenario we have a detailed knowledge of equivalent position salary, we just don't know which of those thousands of numbers belong to our coworkers. How does that remaining ignorance hurt me in any notable way?