UEFA have handed Lille a number of punishments following FFP infringements, including that they will not be able to register newly signed players into their European Cup squad unless they make more money than they spend in transfer windows. : Gunners
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It is set up to benefit the teams that make more money. There is no “fair play” in a “capitalist” model where you cap investment. The only fair play is that it’s nearly impossible for someone to make a significant leap in stature in a short amount of time. It requires long term winning and brand building but that’s nearly impossible when the gulf between the haves and the have nots is so large.