“I knew that of course most private-equity investors make the U.S. economy stronger,” the man wrote, a little indignantly. I’d come across the quote, from The City Journal in 2012, while looking for something else. It’s published by the conservative Manhattan Institute for Policy Research, and prestigious enough for Barnes & Noble to sell it.

Its former editor Myron Magnet complained that Mitt Romney’s presidential campaign never answered the charge that his private equity firm had done nothing but exploit people to make vast amounts of money.

Romney, you may remember, became famous for saying to very wealthy supporters at a private event that 47% of Americans “will vote for the president no matter what. ... They are dependent upon government, they believe that they are victims, they bel

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