I think everyone agrees that salary secrecy benefits primarily the company over the employees as a group. But the subtlety is that it also benefits the good ne

I think everyone agrees that salary secrecy benefits primarily the company over the employees as a group. But the subtlety is that it also benefits the good negotiators or others who are seen to provide unique value by management as they can be paid more without inflating salaries across the board. As an individual, there's a game theory aspect where if you believe you are paid more, it is not in your best interest to share that information. Now of course you might choose to ignore this and disclose anyway in solidarity with your colleagues and a belief in the greater value of transparency, but it may come at some personal cost.