Journalist Chrystia Freeland has spent years reporting on the people who've reached the pinnacle of the business world. For her new book, Plutocrats: The Rise of the New Global Super-Rich and the Fall of Everyone Else, she traveled the world, interviewing the multimillionaires - and billionaires - who make up the world's elite super-rich. Those at the very top, Freeland says, have told her that American workers are the most overpaid in the world, and that they need to be more productive if they want to have better lives. "It is a sense of, you know, 'I deserve this,' " she says. "I do think that there is both a very powerful sense of entitlement and a kind of bubble of wealth which makes it hard for the people at the very top to understand the travails of the middle class." How are the super-rich ... different from the super-rich of the past - say, 1955? Well, there are many more of them, and they're a lot richer than they used to be. "One of the things which is really astonishing is how much bigger the gap is than it was before," she says. "In the 1950s, America was relatively egalitarian, much more so than compared to now." CEOs earn exponentially more now, compared with their workers, than they did 60 years ago. Freeland says she's worried about what she calls an inevitable human temptation - that people who've benefited from a mobile society, like America, will get to the top and then rig the rules to benefit themselves." You don't do this in a kind of chortling, smoking your cigar, conspiratorial thinking way," she says. "You do it by persuading yourself that what is in your own personal self-interest is in the interests of everybody else.