The point about money isn't related to individual games or even individual seasons.
However continuos differences over several seasons and it will manifest itself.
Bale wasn't great at first yet they were able to continue to spend while he improved.
That's where the important factor is; they are less likely to suffer if a player doesn't work out as they have more players.
We suffered when Mirallas was out as we don't have adequate replacements.
It's the cumulative effect of the money.