But why does this trend towards greater inequality over time occur? From his data (spiced up with some neat literary allusions to Jane Austen and Balzac) he derives a mathematical law to explain what happens: the ever-increasing accumulation of wealth on the part of the famous one percent (a term popularized thanks of course to the “Occupy” movement) is due to the simple fact that the rate of return on capital (r) always exceeds the rate of growth of income (g). This, says Piketty, is and always has been “the central contradiction” of capital. But a statistical regularity of this sort hardly constitutes an adequate explanation let alone a law. So what forces produce and sustain such a contradiction? Piketty does not say. The law is the law and that is that. Marx would obviously have attributed the existence of such a law to the imbalance of power between capital and labor. And that explanation still holds water. The steady decline in labor’s share of national income since the 1970s derived from the declining political and economic power of labor as capital mobilized technologies, unemployment, off-shoring and anti-labor politics (such as those of Margaret Thatcher and Ronald Reagan) to crush all opposition. As Alan Budd, an economic advisor to Margaret Thatcher confessed in an unguarded moment, anti-inflation policies of the 1980s turned out to be “a very good way to raise unemployment, and raising unemployment was an extremely desirable way of reducing the strength of the working classes… what was engineered there in Marxist terms was a crisis of capitalism which recreated a reserve army of labour and has allowed capitalists to make high profits ever since.” The disparity in remuneration between average workers and CEO’s stood at around thirty to one in 1970. It now is well above three hundred to one and in the case of MacDonalds about 1200 to one.
David Harvey in Afterthoughts on Piketty’s Capital (Davidharvey.com)