Yes, money is one of the factors why the same thing happens in Ligue 1, Paris Saint Germain is very dominant there, this cannot be separated from the financial capabilities they have, while other clubs do not have the capabilities as big as Paris Saint Germain has. We'll see when they brought in 3 strikers labeled as stars at that time, only they were able to do that, not to mention the privileges given to one of the players who is currently a problem.
If only other clubs had the same abilities as Paris Saint Germain, I am very sure they would be able to keep up with Paris Saint Germain in the competition. In my opinion, that's what they have to fix first, how their income can increase to be able to make changes to the squad. Because it cannot be denied that differences in financial capabilities ultimately create distance between clubs.
Financial capabilities can't be over looked when it comes to the team strength because with their financial capabilities they will be able to FasTrack the growth of the team without necessarily having to go through the process of gradual growth and further more they can reenforces the teams strength even in the middle of the season as this if only the team has the financial abilities.
Even with the financial capabilities, the place of growth and team build up can't be over looked and that's the problem PSG has got which have made it some how difficult for them to win the champions league even after several trial with buying stars and good strikers, if they look back at the players in that team and see how well they can build on those players, the tendencies of the team becoming even much better is very much high and same applies to other Ligue 1 teams, they don't literally have to wait to have the whole financial capacity but if the build on that which they have, it could later serve as income generation source for them and even help them further to be able to afford bigger players who will strengthen their team and bring home the competition and fun in the Ligue 1.