My instincts tell me that labor is something with a price like anything else, and (aside from claims of unfairness) more transparency is better. The end result over time would presumably be the price of labor (salaries) would more closely resemble actual market value.

But I also consider myself to be a high performer, and the last thing I want when negotiating a raise is my boss to have to think about how the rest of the team will feel about it. I want him to care only about whether or not my services are worth it for the price I'm asking. And that just won't happen if it's all transparent.