Billionaires should not exist.We can always argue to eternity about the finer points of economic justice beyond that, but if we could just at least focus on that one part of the programme, we’d likely solve most of the urgent issues all at once.As for the “how”: I naively think that merely enforcing aggressive and effective taxation that goes asymptotically to 100%, would do most the work. But admittedly we are fast reaching a point where a bit of guillotine-based coercion might help.