I have to throw in my perspective on this, possibly because I think it is worth something, but mostly because I think it is different than most of what I've read.
While the supporters do not get paid as the likes of Wenger, and in fact subsidize his and the players' wages with exorbitant ticket prices, etc, I certainly want to point out that some of the fault lies in their hands.
Their dynamics with the club and amongst one another is like a study in masochism. Within their social media, it seems they have a brilliant time with jerking one another off about how shite they are, and not even in a joking manner. They are quick to blame Wenger for not instilling a sense of confidence, whilst degrading, harassing, booing their players before, during, and after the game at the slightest hint of trouble. No surprise they tend to collapse at similar times every season - it could have a number of factors, of course, but I cannot stress enough the toxicity of the habit of their fan base to give up being actual supporters in the winter. They don't want their team to perform well, they want their ticket prices to have meaningful influence on the administration of the club.
I stress that I cannot blame them for being as upset as they are. That being the case, I don't think I can blame Sanchez and the like for phoning it in. Sure, he gets paid millions, but he'll get paid that whether or not he plays well, and I certainly wouldn't fault Sanchez for sticking it to the precious beauts in the stands. Their apologetics for his shite play and general harassment of the manager and other players speaks to this. Its a fucking circus over there, and the fault lies in large part to the rabid, entitled fan base when their best players leave this summer. It is entirely on them the fact that they've becoming the laughing stock of the football world.
Good riddance.