This happens everywhere really. People always question what their bosses are doing, or comparing their salaries with someone else's [I'm currently underpaid at my company and I can list about 5 people on top of me who don't even do 20% of the amount that I do].
It just isn't ever made this public though.
Laveranues should focus more on getting healthy first and then prove your value. 646 yards receiving isn't going to get you a raise. Hell, it may get you a paycut. Only one 1000 yard season with the Jets, the previous were 800+.
Underachieving and bitching. I love it.