As long as financials seems this different, no team will have a chance to beat PSG to be fair. The gap between how rich PSG is, and how other teams look, is pretty obvious when you look at how much they are spending each season. It not even just about how much they can spend on transfers, that's great and all but it's also about the fact that PSG can pay much more in salary as well, so that's an important part, and I am pretty sure that is going to be a tough thing for all of the other teams.
When you calculate all these financial differences, you will end up seeing how PSG will easily beat everyone at France, and the only problem they have is that they are incapable of winning the UCL, which has been a tough task for them.
It seems that this financial fair play stuff isn't really working on teams like Manchester City and PSG because those two teams spends recklessly and way above their revenue. The PSG take over happened less than 15 years ago, the question is apart from the owners money where else could PSG get the kind of money they are spending? Because they could not have generated such amount of money internally, the owner just pump in money at will thereby reducing the ability of the other 19 teams to compete with them financially. I just wonder why the league organizers have turned a blind over this for ages now. PSG will keep on struggling in Europe because they lack competition in France.