Finance affects many things in football because with money clubs can buy the players they need so that the competition will be much more interesting. Now what is happening in Ligue 1 is that only PSG has good financial capabilities so they can recruit the players they need and it is difficult for other teams to compete with them if they are in a condition like now which will indeed be limited to player recruitment.
Well I think it is not the fault of PSG that some of these club aren't financially buoyant enough to run their affairs rather PSG are fortunate enough to have been found worthy by the Qatari investors who bought the club and made it what it is today.
But that being said it is very important to reiterate the fact that even with all the money the club has to spend in the transfer market they are still restricted to an extent due to the financial fair play rule which restricts them from spending more than the stipulated amount of money per season and also we must also take into cognisance the fact that some of these other clubs that do not have the financial power to participate effectively in the transfer also indulge in selling their best players just to stay afloat which could also be detrimental to chances of survival in the league.