The Frenchman believes self-sufficiency remains the best way forward for the north London club, despite a growing number of critics of his prudent transfer market strategy
There has been heavy criticism of the Gunners' relative lack of spending, fuelled by the departures of Cesc Fabregas and Samir Nasri last summer and the club's failure to win silverware for seven years.
However, Wenger believes the finger-pointing is mis-directed.
"What is unbelievable is that we run the model that should be absolutely normal and we look crazy. That is crazy," he told reporters.
"People will do anything stupid, but we are not crazy, we are all right. We spend one [pound] if we make one and [then people say] 'what are they doing?' That is what is absolutely mad in our world, but the whole world is bankrupt because of that."
The 62-year-old reflected on the summer departures and admitted they were "hard to take".
"Last year we were very close to the top and there was a rupture in the building of our team with losing [captain Cesc] Fabregas [to Barcelona], Nasri [to Manchester City] and [Jack] Wilshere [to injury]," he said.
"We could compete with anybody in Europe with our midfield."
Wenger added: "When we play a young team you have to understand as well that we have chosen that policy.
"What is difficult to take once you get close is that the players move, and that is where we are in trouble.
"It is not the policy, it is not keeping our players once they arrive in a mature way."