The only problem is how long saudi can only rely with the money to help the club gets demand by recruiting european players? we have seen that many times that if this is not fully worked. You can see that some players have been trying to exodus back again to the european competition.
This is also destroying the reputation of the league as well as there would be some bad reviews about this, i think that this can become the consequence when you were hiring people caused by money. They were not willing to play in this league but they came due to the money.
So, we can take this as the main evaluation to consider whether it was successful or not.
What is certain is that they have the budget for that, even Benzema cannot just let go as he wants to return to playing in the European League. in the end, Benzema returned to strengthen Al Ittihad even though there would always be mediation or previous discussions in the end of which he stayed. well, then what else does Saudi offer top players apart from money and abundant salaries. in fact, I'm sure the Saudis are fully aware of what they are planning in their mega project. well, I'm not sure what you said. the proof is, their league is still running as usual. Ronaldo remains the theme of discussion in this thread, on the other hand, Al Hilal is predicted to have a high probability of winning the Saudi Pro League trophy.
Actually, what you said is not wrong at all. but what is certain is that money is their tool to open the door for those interested in joining this League. what we don't know for sure is the Saudi vision and mission behind this industry. I mean, apart from football they have progressed much more than football. however, football is the path for the Saudis in the context of the projects they are planning and working on. that's why, PIF is involved in this. one of them, becoming the host team in 2030. apart from that, Saudi opens up space to the whole world. in the end, football cannot be separated from business and all its aspects. well, this is just from my personal point of view.