Real financial fair play would be if every club had the same amount of money available. I suppose the closest system is the US NFL or NBA, but also there I guess some are more equal than others. I am not sure it can be really done, and I find it a strange idea to forbid anybody to invest money in their own business. Applied in the high tech world where I am at home it would mean no start ups. It is a truly bizarre idea, and the only purpose it serves is to protect the interests of those already rich.