It's a very loose argument you have there.
City and Chelsea can afford to spend anything they want, and practically buy anyone they want if they chuck enough money at it. There is no barrier, save squad size and FFP (guffaw).
That 50m was to bridge a relatively small gap....not to finance limitless spending.
Of course its a leg up, but the comparison to City and Chelsea is very far fetched. That's a different league of doping.