Liverpool manager Jurgen Klopp suggested if Financial Fair Play is no longer about revenues then someone could spend "a billion a year of his own money".
On Monday the Court of Arbitration for Sport lifted the suspension imposed on Manchester City by UEFA's club financial control body for breaching Financial Fair Play (FFP) regulations.
The alleged breach was in relation to the overstatement of sponsorship revenue and the break-even information submitted to European football's governing body for the period between 2012 and 2016 but CAS found most of the allegations were "either not established or were time-barred".
"Ask me can we develop the squad and it is probably possible, but only with real money.
"We have talents ourselves, big talents, and players who can make big steps in our squad. But buying now?
"Just go out there and name whoever you want, whatever the player is, go for it? That is really difficult.
"We did not invest a lot in the squad last year and that was before Covid.
"If we have money, we will spend. If we do not know if we will have money, we probably will not spend that much. That is how it is.