That website rubs me the wrong way in so many ways - the premise of "what could we do with X% of $what_someone_who_is_not_me_owns" with no concern for the owner, and "no person deserves this much wealth" with no concern given to the very important question of: Who can judge what anyone "Deserves"?
They can keep their wealth because the rest of us protects it, often with our blood. (Military and police, for a start, but that’s just scratching the surface.)
This is true in terms of orders of magnitude, but gets hilariously true when looking at the absolute numbers.
The difference in wealth of a homeless person and a (barely) millionaire is about a million ($1,000,000).
The difference in wealth of that millionaire and Jeff Bezos is about a Jeff Bezos ($138,999,000,000).