The frugal Frenchman was responding to growing pressure that he must strengthen during the current window after yesterday's Barclays Premier League defeat to Manchester United.
A poor first-half display meant Arsenal went in at the break 1-0 down, but a spirited performance after the interval led by impressive debutant Alex Oxlade-Chamberlain helped the Gunners draw level, through captain Robin Van Persie.
However, following a controversial substitution which saw Oxlade-Chamberlain withdrawn for out-of-favour Andrey Arshavin, United regained the lead through Danny Welbeck's close-range strike, meaning the game finished 2-1 at the Emirates Stadium.
Injury problems continue to plague Arsenal's season, and Wenger was forced to play both Thomas Vermaelen and Johan Djourou out of position at full-back on Sunday.
Bacary Sagna, Kieran Gibbs and Andre Santos all remain sidelined, meaning the Gunners have had no recognised full-backs available this side of Christmas.
But despite the extensive injury list, Wenger has denied claims Arsenal must spend to improve, and will wait for his injured players to return to fitness.
"Spending money is not the target," he said. "It never has been in life.
"We need our players back. We missed 10 players. When you see what we created in the second half, it's important for us to get the players back."