When was the last time they were in for the same player as the top 3? And for that matter when was the last time the top 3 were in for the same player as eachother? It rarely happens so not much of a point to be argued for either way, it might suit your Wenger is a hero working on a restricted budget agenda but the facts are they are shopping in the same bracket as the rest of the top 4 - the 30m/40m+ plus proven talent on 150k+ per week wages bracket that the rest of us are nowhere near competing in.
falcao, schneiderlin, dzeko, david silva, juan mata, yaya, sterling thats just off the top of my head. then theres a list of players that arsenal didnt even dream of getting when they moved to one of the top 3; aguero, shevchenko, torres etc. following that, arsenal have never got a key player from one of the top 3, but have lost absolutely vital players to each of the top 3 clubs; rvp, ade, nasri, cole etc.
if you want to set the line at 150k wages, why not just set it at 100k and put the likes of us and liverpool in the same bracket as the top 3.