Don’t see the problem with his wages tbh. He’s fit and able as far as I can see and willing to play. Arsenal offered him this contract and it’s Arsenal who’ve now decided they don’t want him any more so it’s up to Arsenal to make up the 20-30k or whatever shortfall for the next 9 months.
Im guessing he’s not stupid enough to be asking for the same / more at other clubs. But then again, maybe he is.