At the end of the day, the Premier League most likely wish they had never started this witch hunt against Manchester City, for their rules regarding financial conduct have been shown up for being anti-competitive and therefore illegal. What did these goons expect, for Heaven's sake?
Let's take an example. Suppose the owners of a clothes manufacturing company were frustrated because their ambition to move the business forward lacked the capital investment required to turn the project into a reality. If they could make more of their clothes they could certainly sell them but, alas, they are already working flat out at full capacity. Suddenly, a group of hugely wealthy entrepreneurs arrive on the scene and offer to plough countless millions into the firm; they will extend the current factory to increase production and, while they're at it, they will build another plant to go with it so that the company can also start producing some new lines of fashion. The directors and shareholders are fully entitled to take advantage of this offer, for the textile industry has no "regulations" preventing a flow of investment into any of its businesses. It is the same story in every other industry. Why is football any different?
The only proviso, of course, must be that the flow of investment has been obtained legally and has clearly not been sourced from the proceeds of crime. So long as this condition has been met it is surely nobody else's business if any club acquires new financial backers.