That's the problem. The wealth of billionaires isn't tied to any particular country, so they always have the means to move their wealth to a tax haven. Calls to tax the rich always end up falling to the upper-middle/lower-upper classes (e.g. FAANG engineers who read HN).

Not the only source but https://www.hurun.net/en-US/Rank/HsRankDetails?pagetype=glob... for a full list of billionaires (according to Hurun).

That's the very definition of cherry picking.

Try this dataset instead:

https://en.wikipedia.org/wiki/List_of_countries_by_number_of...