I think he and club have made big mistakes in these last couple summers. Should have seen early what new TV and other sponsorship deals will mean for clubs. No point saving up money as every club has lots now. He can still correct the situation a bit, but in my opinion biggest mistakes were these two previous summers where he should have gone in big, but refrained.
One thing about Pogba transfer I admire Utd about is that they wont let fees step into way of making a deal they want to. Arsene needs to do the same now especially as Gabriel got injured. He should be prepared to spend whats necessary now to sign the much needed defender and forward.
Also tbh we are always falling behind at least according to press and pundits, but somehow end up ahead of many of our competitors.