I don't think Wenger has any more excuses to be honest.
For years he was able to use the rationale of having comparatively no money while others had free will to spend as they pleased, and indeed most - even the most ardent Wenger Outist - could accept this.
Now however he has money, lots of it, but chooses (we have to believe) from his own free will not to spend it - last summer for example. In essence a huge misjudgement of his own players / squad and the great intangible qualities he loves to continually harp on about.
Wenger out!