The model isn't necessarily the problem. You can run a club responsibly and still move on an upward trajectory; see: Tottenham. Look, the club made a ~20m profit this season. Hmmm, which player was sold for around 20m? I know it's easy to say in hindsight, but why the fuck didn't anyone, whether it's the board or Wenger, tell RVP to sit the fuck down, play out his last year at Arsenal, and, in the end, if he still wants to leave for a fat contract, he can. Everyone wins.
The problem isn't the lack of oil money, the problem is that the board and Wenger are getting pushed around every fucking summer. Either give them the pay raises they ask for or don't let it get to the point where the club is basically publicly humiliated every summer and we're forced to sell our best player. It's ridiculous.
Oh and, Wenger, why don't you fucking buy a defensive midfielder for once. They're not that expensive, I promise.