If you're the sort of billionaire who wants to take a shot at developing a modern Utopia, by whatever metrics you personally care about, buy a few square miles somewhere, move your corporate headquarters and 25k jobs there, and go nuts playing sim city with real people.

Sure, not every potential employee is willing to uproot themselves and move to Bezosburg, but not every potential employer is willing to move to New York or Silicon Valley or Louisville. But between a good salary and the appealing amenities of Bezosburg, you should be able to attract plenty.