International organizations (like WTO, WIPO [even if we think the copyright is too long, and most of patents are dumb, etc] various UN projects), free trade agreements and such are supposed to keep that "power centralization" in check (eg. with things like ISDS and so on).
But in the end we can't just ignore politics and hope for the best. Yes, maybe, maaaaybe in the graaaaaaaaaaand scheme of things we can. (After all if humanity fuck up so much that we go extinct maybe that's "the best".) But, but, it also doesn't mean that markets and free trade doesn't work. (They work, but they are not miracle tools.)