We’re looking at two extreme ends of the pole here. Zuck, Bezos, Musk are the shittiest public billionaires. There are also more secretive ones who are arguably even more destructive. These people have absolutely justified their own downfall, if it ever comes to pass. On the other side, Dolly doesn’t even technically count on this list because she has given enough away to not be a billionaire. Those are the easy cases where almost every reasonable person agrees on the “right” thing to do.
Now, we have to remember that there are people who exist at every little increment along that scale of giving back to general shittiness for the global population. Focusing on the billionaires themselves and their lifestyles or whatever is not the answer. We need to focus on making effective tax brackets, effective regulations on the avenues billionaires generally target for power (political institutions, media companies, etc), and effective spending of the increased income from those new taxes to help raise the lower class to a more equitable position. That’s a socdem perspective though, because I do not foresee capitalism collapsing in my lifetime and I like to be pragmatic.