A salary doesn't magically make you like working where you don't want to work.
The salary just guarantees that you show up, and probably even less so the bigger it gets, because a guy like Mika Zibanejad can afford to just quit and never work again if he wanted to.
I'm not attempting to re-litigate who was right or wrong in that situation, I'm just saying you can't write off every potential problem as "oh well, you were paid."
I don't want our players to be motivated by money. Not in this world where the talent is the 99th percentile of the 99th percentile, and preparation/focus are paramount.
That doesn't mean there's an environment where people are always happy, and sometimes they have to tough it out, but you can't hand-wave problems because the players are rich.