I'm a firm believer that a player has an obligation to play out his contract.
But.... if a team makes the decision to reward a player for their play that's different.
What do you say about about paying a guy that is no doubt the best D player in the league, and maybe the best period?. First ballot HOFer. Will be argued forever as maybe the GOAT DT. He is currently, arguably, the premier player in the NFL and suddenly he's a guy that the media, talk show hosts, etc., want to interview because he comes off really well. He's the Lawrence Taylor of our time (different position I know, but that dominant game in and game out).
Guys like to play for the Rams for all kinds of reasons and this is one of them. If your plan is to stockpile stars and do it successfully, then you must understand the market, the egos, and the draw. When a Tyreek Hill gets $30 mil per year (stupid move by the Dolphins, btw), what do you pay an AD? I guarantee you that if AD ever hit the open market he'd get Stafford kind of money.