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.)
We're all closer to being millionaires than Jeff Bezos.