Contrarian view: salary disclosure destroys value for people with negotiating skills, which are among the most valuable and useful skills of all. Disclosure advantages people who collude to apply political pressure (gang up) instead of appealing to principles or leveraging their skill and the value they bring. There is general social and economic harm to facilitating this behaviour. Disclosure lowers all boats in tha…
Better signalling about compensation opportunity is good for employees and for employers who compensate well.
It's bad for shops who pay everyone the same or otherwise pay poorly.
Managers are already given an advantage in negotiations because they have data to refer to. And they use that data opaquely. As in "trust us, you are already paid well".
As a counterpoint, professional athletes and salespeople regularly share salary (or sales) figures. They are certainly not all paid equally.