A natural next step is to enhance his control over the remaining oligarchs’ money by forcing them to repatriate it. John Christensen, executive director of the Tax Justice Network, which campaigns to open up the shoal of tax havens that are all that remains of the British Empire, says that bringing the money home would both increase Russia’s tax take and improve the Russian economy by forcing businessmen to invest productively rather than in London property or U.S. basketball teams.