Branko Milanovic is an economist at the World Bank. He first became interested in income inequality studying for his PhD in the 1980s in his native Yugoslavia, where he discovered it was officially viewed as a sensitive" subject - which meant one the ruling regime didn't want its scholars to look at too closely. But when Milanovic moved to Washington, he discovered a curious thing. Americans were happy to celebrate their super-rich and, at least sometimes, worry about their poor. But putting those two conversations together and talking about economic inequality was pretty much taboo. "I was once told by the head of a prestigious think tank in Washington, D.C., that the think tank's board was very unlikely to fund any work that had income or wealth inequality in its title," Milanovic ... explained in a recent book. "Yes, they would finance anything to do with poverty alleviation, but inequality was an altogether different matter." "Why?" he asked. "Because 'my' concern with the poverty of some people actually projects me in a very nice, warm glow: I am ready to use my money to help them. Charity is a good thing; a lot of egos are boosted by it and many ethical points earned even when only tiny amounts are given to the poor. But inequality is different: Every mention of it raises in fact the issue of the appropriateness or legitimacy of my income." When the discussion shifts from celebratory to analytical, the super-elite get nervous.