Arsenal boss Arsene Wenger admits he is concerned by calls from the fans to spend big in this summer's transfer window. Gunners supporters have urged Wenger to bring in some big-name signings after ending another season without silverware.
"We want to improve in quality. It is not necessarily a big number of players needed and overall I believe you don't win the title when you concede 40 goals," said Wenger.
"What the fans want concerns me. We both love the club and want the best possible team, but we live in a world not to be crazy.
"We have to pay our wages at the end of the month and we have to respect our business rules."
Wenger also believes Arsenal exceeded expectations this season despite missing out on the title.
"We have gone beyond expectation, if you look at July, but of course we are still frustrated, because one month ago we were in touch with the championship, but did not win it," added Wenger.
"Overall we had a season with a good attitude and strong character, the team has improved a lot on that front, but overall we conceded too many goals to win the championship."
Wenger continued: "We did not have the players available in the last six weeks to fight for the championship. "When you go into the final sprint, you need your squad available. We had too many injuries.
"It is a shame because we have gone out in the quarter-finals of the Champions League to the holders and have been beaten by Chelsea and Manchester United, who have strong squads.
"We were just a fraction short."
