"The American economy is still, by most measures, deeply depressed. But corporate profits are at a record high. How is that possible? It’s simple: profits have surged as a share of national income, while wages and other labor compensation are down. The pie isn’t growing the way it should — but capital is doing fine by grabbing an ever-larger slice, at labor’s expense.
Wait — are we really back to talking about capital versus labor? Isn’t that an old-fashioned, almost Marxist sort of discussion, out of date in our modern information economy? Well, that’s what many people thought; for the past generation discussions of inequality have focused overwhelmingly not on capital versus labor but on distributional issues between workers, either on the gap between more- and less-educated workers or on the soaring incomes of a handful of superstars in finance and other fields. But that may be yesterday’s story."
http://www.nytimes.com/2012/12/10/opinion/krugman-robots-and-robber-barons.html