My high school, a few years before I got there, once decided to post the teachers' salaries in the lounge for all the teachers to see. The salaries had no names next to them, but since they did list the length of each person's tenure, the teachers deanonymized the list quickly.

There was a ruckus when people discovered that a lot of the worst teachers were making the most money. Your salary was basically determined by how frequently you had the nerve to ask for a raise, plus some consideration for how long you'd been at the school. Not exactly a winning compensation scheme.

If your compensation scheme is well-reasoned and defensible, it's a lot less of a problem when people figure out how much everyone else is making. If your compensation scheme sucks, expect outrage.