Wenger's men defeated their Dutch opponents 4-1 at the Emirates Stadium to leave them needing a point to qualify for the Champions League knockout stages.
Assessing the number of attacking options in his squad, Wenger said: "As many on the creative side? Certainly not. We had still Nicklas Bendtner and Theo Walcott who are offensive players who are not available.
"Denilson, Eduardo, Rosicky did not start, that is why I was amazed when people said 'buy, buy, buy.' And Vela as well, I forgot him."