I don't think that PSG dominance in the French ligue 1 is only due to the fact that PSG is rich I will not agree with you on that because in today football there is financial fair play rule that applies,so a team can't go and bring money from another source of income to sponsor a team the truth is that other teams in this league are not just serious about competing and this is not only limited to the French ligue they don't even do well in European competitions.
PSG's wealth is not really from another source, the win the Ligue 1 almost every season and they win other sub league titles plus their jersey sales which most other teams do not get as much so their wealth is not far fetched and they also utilise it well with the quality of players they bring in so it may not be all abi their wealth, but it does plays a very vital role that will continue give them that topping edge which most other teams does fail to get so you cannot dissociate their success and strength from their wealth, they all work together.
Despite all this, PSG is a financially rich club. Winning the league title or becoming the champion of other tournaments alone will not get so much money that if they had that much money, they could have taken Mbappe, Neymar, Messi, Ramos and other world-class stars to the team at the same time. However, there are many differences between that time and the present. At present, PSG has let go of all the expensive stars and they have relied more on young players. Luis Enrique has already proven that it is certainly possible to build a strong team with young players. The young talented players that PSG currently has in the team will be seen in a few years who are selling these young talented players to other clubs in Europe at high prices and they are making a lot of money by selling these players.
Paris Saint-Germain has truly stepped up in this regard. They've built a fantastic squad by relying on young players and, under manager Luis Enrique, won the Champions League. I can't see any team competing against them in the French league either. I believe they'll perform magnificently again this year. In a few years, Europe's biggest teams will be making transfer moves for Paris Saint-Germain's young players. This will translate into significant revenue for Paris Saint-Germain.