Well he certainly shouldn't be our highest earner, though the issue is more to do with the fact we don't and are not prepared to pay the market rate salary for our star players. The market rate salary for a top 4 club. Saying that Citeh & Chelski have completely distorted the market rate, though we should be paying our star players more than we currently are, but a lot of that is down to our botched wage structure that was implemented by Arsene.
Edited to add: The market rate salary for our star players.