Not everybody is. There are always a few top-20 players who are either on their rookie contracts or on another contract that they've outplayed. For example, Kam Chancellor is easily a top-20 safety, but he's under contract for under a million a year for two more seasons. Chung will absolutely make more than him (pending a Chancellor extension, of course), but is not a better player than him.
Fair point- thanks for clarifying. My point was mostly semantics, in hindsight, but I see where you were going with that and agree with you.