A new report has now revealed that some of the world's richest people have more than $30 trillion stashed in offshore assets, having exploited gaps in cross-border tax rules to move money overseas. Research commissioned by the campaign group Tax Justice Network says the value is as much as the gross domestic products of the US and Japan combined. Should tax havens be allowed to exist? Guests: Jean-Pierre Diserens, Myret Zaki, Sony Kapoor.