Could you explain the joke?
Why are all those billionaires (more specifically, Thiel, Andreessen, and Srinivasan) boosters of the book "Sovereign Individual: How to Survive and Thrive During the Collapse of the Welfare State"? A book, which the article points out, "identified New Zealand as an ideal location for this new class of sovereign individuals".
If the joke depends on a shared set of libertarian beliefs, then doesn't that say something about the billionaires?
While the article does spend a lot of time talking about that rumor, it was part of a larger analysis which included the concept of "utopia", and the differences between the utopian dream of "Sovereign Individual", of Thiel ("a man with a particular understanding of what a utopia might look like, who did not believe, after all, in the compatibility of freedom and democracy"), and of Kiwis in general and of Māori more specifically ("any invocation of New Zealand as a utopia was a “giant red flag”, particularly to Māori like herself").