Ok, question then, seeing as we're moving in that general direction and comparing out own (arguably?) 'squad' players with other big teams'.
Can you afford to have players who are, at best "decent" starting regularly and operating in the attacking 3rd of the pitch?
I think most teams have players who are average, squad players, you know the sort, but the likes of Man Utd, Chelsea maybe have them in the "non-cutting edge" positions (e.g. Wes Brown, John O'Shea, Fletcher - Mancs or Ivanovic, Ferriera, Belletti - Chelsea).
Goals win games at the end of the day, and both Chelsea and Man Utd have quality in their attack.