I think it is naive to think PSG can't offer him any more than we can, financially. They can offer the same wages or more. We can persumably offer shares in the cfg group (something assumed based on claims in a few papers, but never yet done), or playing/coaching in the states. They can offer image rights in Qatar and a role in the tourist industry to get paid for simply existing. (something already tested).
If he does decide to leave Barcelona, and it is a big bloody if, and if, again big if he goes with a football based decision where to move next, then i do think we offer a lot more than PSG or anyone else. All depends on what he wants. Always has.