The Premier League wants to remain the best league in the world but at the same time it wants to restrain its members' revenue avenues? Make it make sense.
If the Premier League wants english clubs to ever have a strangehold on European trophies it needs to do away with PSR and let clubs put in how much money they want to put in.
There is an argument that the Premier League is currently in an almost unassailable position as the most valuable league in the World.
The TV rights are double La Liga, and more than triple Serie A and the Bundesliga. That inequality is pretty much unprecedented, and with the amounts involved isn't likely to be closed any time soon.
The PL has also gone from a big three, to a big four, and now a big six - all in the top ten richest clubs in the World. Elsewhere, while the superclubs are doing well, the gaps between the traditional big 1 or 2 in each league is getting even larger. While I think the PL has too many rich clubs for it to happen, France is a major warning to any league that allows an owner to put in money way beyond the rest of the clubs. PSG are now something like four times the size of any other club, but the league's value is pitiful, with PSG's yearly revenue higher than Ligue 1's entire TV deal!
The PL has the most money, the best players, and is still more competitive, with more "world famous" clubs than any other league. They're probably happy with the status quo (as obviously are the clubs at the top).