Football is changing, PSG is not the only club where they can pay more, and you are right now it is clear that the team is going through a stage when players are disillusioned with the club and are trying to find another place where they can realize their goals. Perhaps in the off-season, PSG will once again bring together star players, but they have done it so many times and now it's all over again, it doesn't look like it can bring them the desired result.
I am doubtful if the owner will try to repeat the same pattern again. Trust the process instead of attempting to make instant changes.
This strategy was used by khelaifi to rebuild PSG a few years ago after he was buying PSG. The problem is that so many problems have been occurring since there have been many star players acquired by PSG.
The internal problem has become the main reason that was making the club become unsuccessful like this time. It's only the winning french league which was nothing special for us.
Remember how much money was already spent by PSG to buy neymar at that time? Neymar has become the biggest transfer in history. There's no transfer that can be even bigger compared with PSG's neymar transfer from barcelona.
PSG is not something they want to actually "win", that's not the point. It's a media thing and they need to be there to actually be heard, if it's a win that's not getting media attention, they rather not win it, they don't care. Which is why it's not going to be easy to build a team slowly, if they did that they would be terrible.
This has been discussed before, they need media attention and Mbappe gave them that. They need to spend a ton of money so that they could have a big name club, big names in the club means more newspaper and more attention. I think it's going to take a while but it will certainly be a situation where the owner requires them to get some huge names to play for them and be loved by the world or at least get talked about the very least.