It's not a perfect article by any stretch but the author does have a point in the last section. It's quite amazing that nearly all of Wenger's teams from 2006 onwards have had the same defensive issues and the high number individual errors leading to goals each season which shows no sign of improving.
That maybe so, but it's a completely different issue from our finances. The article was trying to equate Wenger using finances as an excuse for not matching Chelsea, City etc but being happy to take a massive pay check. That is disingenuous in the extreme.