The Barclays Libor scandal may have shocked the British public, but Joseph Stiglitz saw it coming decades ago. And he's convinced that jailing bankers is the best way to curb market abuses. [Former World Bank Chief Economist] Stiglitz wrote a series of papers in the 1970s and 1980s explaining how when some individuals have access to privileged knowledge that others don't, free markets yield bad outcomes for wider society. That insight (known as the theory of asymmetric information") won Stiglitz the Nobel Prize for economics in 2001. And he has leveraged those credentials relentlessly ever since to batter at the walls of "free market fundamentalism". It is a crusade that [includes] his new book The Price of Inequality. When traders working for Barclays rigged the Libor interest rate and flogged toxic financial derivatives - using their privileged position in the financial system to make profits at the expense of their customers - they were unwittingly proving Stiglitz right. "It's a textbook illustration," Stiglitz said. "Where there are these asymmetries a lot of these activities are directed at rent seeking [appropriating resources from someone else rather than creating new wealth]. That was one of my original points. It wasn't about productivity, it was taking advantage." He argues that breaking the economic and political power that has been amassed by the financial sector in recent decades, especially in the US and the UK, is essential if we are to build a more just and prosperous society. The first step, he says, is sending some bankers to jail.