The U.S. working class is twice as productive as it was in 1968. That is, each worker now produces twice as much value as she or he would have 40 years ago. But our wages have the same value—the same purchasing power—as they did 40 years ago. All that extra value has gone straight to Wall Street, to the already rich.
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the article from which this is taken:
Has it ever been more clear? Billionaires, your time is up. You, and your system, are the cause of deepening poverty and economic insecurity. We need socialism now.