I think it's kind of like discussing your salary. It's considered wrong because in general management doesn't want everyone to know just how arbitrary compensat

I think it's kind of like discussing your salary. It's considered wrong because in general management doesn't want everyone to know just how arbitrary compensation is. If you really dig into it, you'll find huge variations in pay for similar skilled, experienced, and hard working employees just based on who did the hiring, how much was asked for, and when they were hired. When I was in college I had a job where I made about 50% more than most people I was working with--I didn't really work harder (everyone worked hard) nor was I much more skilled. I just negotiated a bit better, and was hired by the right manager.