This is a question of politics and can not be divorced. Satya's wealth will go down.
Eg. global minimum tax schemes are a promising category og tools to fix this. Indifferently to how you see it, that would decrease somebody's wealth, that they are being taxed on their (foreign) assets.
Increasing quality of life for the poorest people will have to require wealth (and power) redistribution – but that should happen within a framework of fair regulation and fair taxing.
> Any income differential that results in a power imbalance makes the world worse.
And that might be true but I think it misses the point of the argument. Increasing the quality of life for the global poor is much more important than capping Satya's wealth. There's no equivalence here.