This week, what to do with the world's billionaires. We'll be revisiting a timely chat on how so few can control so much. The total number of millionaires is 660 more than last year. Their collective wealth now at around 13 trillion dollars. Is it a sign of economic disfunction? Does it reflect the risk taking and drive of people like elon musk? Do the riches of these individuals serve to inspire and incentivise others to do similarly brilliant things? And indeed wish them happy travels to the stars, or wherever else they want to go? That's the theme of this debate.