Its not a zero sum game. Many billionaires - including the ones referenced in the article - got that way by executing on ideas/products that improve society. Think of all the ways companies created by billionaires progressed our quality of life (yes even Bezos, Larry/Sergy, Gates, Musk, Zuckerberg, not to mention industries like food, pharma, agriculture, construction, transportation). The way we get to version of society where everyone can have a high quality of life (with socialism, UBI or whatever mechanism necessary) is to first let the current system create these efficiencies.