Where did I talk about PSG?
You can never 100% trust a media when PSG never releases actual contracts details, but anyways.
In the article, you can see Thiago Silva earns +12m per year WITHOUT bonus, which in PSG are in MILLIONS per year (and PSG pays a good part of all their players expenses, and even some taxes). TS earns at least more than 15m euros for sure.
Does higuain earns as much? I bet not.
EDIT: just to be clear, I don't think what PSG is doing is good, but they overpay because no one would sign there if they wouldn't.