The new technologies have chosen winners and losers with little regard for fairness. If you were a really good travel agent or bookstore owner, your livelihood is gone. But Major League Baseball owners, not exactly innovative people, have become mega-rich because they happened to have endless hours of content that’s not likely to be time-shifted, in an era when regional cable exploded. And low ratings–or no ratings–haven’t thus far made much of a difference.

Technology, however, isn’t likely the sole factor in the new wave of income inequality. Politics plays a vital role. From Paul Krugman’s New York Review of Books piece on French economist Thomas Piketty’s new volume on haves and have-nots:

“Capital still matters; at the very highest reaches of society, income from capital still exceeds income from wages, salaries, and bonuses. Piketty estimates that the increased inequality of capital income accounts for about a third of the overall rise in US inequality. But wage income at the top has also surged. Real wages for most US workers have increased little if at all since the early 1970s, but wages for the top one percent of earners have risen 165 percent, and wages for the top 0.1 percent have risen 362 percent. If Rastignac were alive today, Vautrin might concede that he could in fact do as well by becoming a hedge fund manager as he could by marrying wealth.

What explains this dramatic rise in earnings inequality, with the lion’s share of the gains going to people at the very top? Some US economists suggest that it’s driven by changes in technology. In a famous 1981 paper titled ‘The Economics of Superstars,’ the Chicago economist Sherwin Rosen argued that modern communications technology, by extending the reach of talented individuals, was creating winner-take-all markets in which a handful of exceptional individuals reap huge rewards, even if they’re only modestly better at what they do than far less well paid rivals.

Piketty is unconvinced. As he notes, conservative economists love to talk about the high pay of performers of one kind or another, such as movie and sports stars, as a way of suggesting that high incomes really are deserved. But such people actually make up only a tiny fraction of the earnings elite. What one finds instead is mainly executives of one sort or another—people whose performance is, in fact, quite hard to assess or give a monetary value to.

Who determines what a corporate CEO is worth? Well, there’s normally a compensation committee, appointed by the CEO himself. In effect, Piketty argues, high-level executives set their own pay, constrained by social norms rather than any sort of market discipline. And he attributes skyrocketing pay at the top to an erosion of these norms. In effect, he attributes soaring wage incomes at the top to social and political rather than strictly economic forces.”