One way of describing mass immigration is as a verdict on the pay structure that had arisen in the West by the 1970s: on trade unions, prevailing-wage laws, defined-benefit pension plans, long vacations, and the power workers had accumulated against their bosses more generally. These had long been, in most people’s minds, excellent things. But Republicans argued that private business, alas, could not afford them, and by the 1980s they had won the argument. Immigration, like outsourcing and tighter regulation of unions, allowed employers to pay less for many kinds of labor. But immigrants came
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