The benefit to you, though small, is realizing you're a top earner and valued. And you wouldn't have known that had others not shared, which is a bit selfish. I'm not advocating for equity in pay. I am advocating against people being taken advantage of, which they are. No company is going to reduce your pay because person X wants a raise. If they did, quit?
Maybe that person is a top earner but I have seen it several times that people were told and believed that they were top earners but in reality they were right on the average curve for their position or below.