This article missed one huge change in the economy: the shipping container. Incomes of the workers continued to increase, they were just outside the USA. Rich

This article missed one huge change in the economy: the shipping container. Incomes of the workers continued to increase, they were just outside the USA. Rich Americans were running a world economy, not just the American economy, so their incomes increased. American workers did well - their incomes remained high while competing with everyone in the globe.