Power people have power because of power is more of a movie trope than the actual mechanics of the world you live in. Wealth is exclusively abstract legal constructs in the modern world. You might be surprised to know that even Putin's wealth is tied to legal ownership structures, (regardless if they're maintained by bogus shell companies, he has effective rights to the property). Whatever niche counter-example comes after doesn't influence how global inequality is administered or experienced by the majority of people.