"Prevented from existing" might be the wrong answer in some practical sense.
When I look at a list of countries with no billionaires, I'm not jealous of any of them. And all of the countries that I consider to be potentially nicer than mine
does have them.
en.wikipedia.org
When I sort in ascending per capita and ask "would I move there to raise a family?", there's no obvious correlation with a
lack of billionaires.
There could be underlying reasons where treating the question as if extremes are the answer is ... wrong. Just because I prefer a colder room temperature than others, it doesn't mean "colder is better". And just because someone prefers to add a couple of degrees, it doesn't mean "adding 15 is better". Minimum wage has superior options to $0/hr or $200/hr. There are lots of systems where cranking one dial to the maximum will lead to suboptimal outcomes.
I guess there are two modifications you can make to billionaires, laws that constrain their ability to wield their wealth (or assisting them in spending it in ways that are of net benefit*) OR charge a higher fee for how much of it you're willing to legally protect (and then deciding how to spend that fee*)
*These are themselves complicated questions.