In Ligue 1 PSG does not have a fairly balanced rival and they will continue to dominate the league forever. The difference in quality, club finances and resources possessed by PSG will be very difficult for other clubs to break. Now what PSG is doing is no longer talking about how they can get the Ligue 1 title but how they can compete in the Champions League competition.
That's one good thing about PSG because they have the finance to get any players they feel is good for them in terms of improving there level of performance because that alone is one of the greatest advantage because financial challenges has been what so many clubs has been facing concerning not being able to afford a good players when the need arises, so perhaps I agree with you that PSG has the capacity through there resources to dominate the league as long as they want because they have structure the club in such a way that other clubs can hardly win them because even if you check there current statistics you will see they have a very good wining record this season and do to there consistent performance they have not been able to lose any matches for there last 19 matches they have played, perhaps that's one of the ways to no how good a club is.