Last month Dutch historian Rutger Bregman told the billionaires at the World Economic Forum in Davos they should think less about philanthropy and instead pay more tax. The clip of his speech went viral. He comes on the programme to argue his point with Ed Conard, a visiting scholar at the American Enterprise Institute and author of the book The Upside of Inequality, who says higher taxes just stop people innovating. (Photo: Rutger Bregman, Credit: Getty Images)