I suppose it depends on your expectation level. There is a direct correlation between success and spending. Look at the top spenders in Europe and you will see they dominate their respective leagues and Europe.
I'm not suggesting we spend for the sake of it, but I don't care if the club overpays (subjective topic valuing players) for a player they really need or want. Why would you ?
The club is saying it has no limit on transfer funds, why do people just want us getting bargains or unknown gems?
The last season I remember feeling like the club had real world class ambitions in the transfer market was the season we bought Veron and ruud. Two top players reaching the peak of their abilities. No worries about resale value, just spending big on two top players... They were bought only two seasons after wining the champions league. We sold our greatest player after winning the champions league in 2009 and never reinvested in a remotely similar quality player when there was an opportunity to use our success to buy anybody (even in years after when we got to cl finals)...
As I said, money does not equate to success but if you expect to be the best, you have to take risks with big money. Are we always going to be a club that will sell our top players to the likes of Madrid or barca or will we ever be a club signing the bales, Rodriquez, ronaldos, or neymars?
It would seem odd to profess to be the biggest club in the world with transfer ambitions that don't match those of clubs of similar or lesser stature.