Haaland will not go to PSG, City already pays him a lot of money and he is getting a lot of success there, why would he want to leave? I would understand Real Madrid to a point because he could get a lot of success there as well, but why would he go to PSG when they already have so many strikers and still fail.
The salary Haaland gets at Manchester City is not as big as what Mbappe gets at PSG, not even bigger than Mohammed Salah at Liverpool.
SourceAnd if he prefers to stay at Manchester City not because the salary he gets there is already big, but because at his current club he will get a title and competition that is better than Ligue 1, except for Ligue 1 the competition is developing very rapidly in a few seasons thus providing a challenge for many great players to play here.
PSG can attract star players with their money, but not all players will focus on money, but we don't know whether Haaland will remain comfortable staying at City for a long period as KDB feels, if not then not only PSG other teams have the opportunity to get this players, especially elite clubs in the elite league.
I think PSG should try to keep Mbappe as much as they possibly can, and if they can do that it would be great for them, but if they fail to do it then they could find some other players that could increase the overall value of a club. Like instead of replacing a 200 million dollar player, increase 5 places on the squad with 40+ million dollar valuation of the current roster, and you get a 200 million dollar increase anyway.
Keeping Mbappe at this club doesn't seem like an easy job for PSG, money is no longer likely to be the right tool to tempt Mbappe because it seems he really wants to get more and more prestigious titles, rather than continue to earn a large salary.