There's no doubt that the U.S. economy is in a boom. The Conference Board is reporting the highest levels of job satisfaction in more than a decade. This is probably because of a tight labor market — the ratio between the unemployment level and the number of job vacancies is at its lowest level in a half-century.

A broader measure, the prime-age employment-to-population ratio, is back to 2006 levels. Meanwhile, real gross domestic product growth for the second quarter was just revised up to 4.2 percent. Corporate profits are rising strongly. And investment as a percentage of the economy is at about the level of the mid-2000s boom.

Wages are still lagging. But all other indicators show the economy of the United States performing as strongly as at any time since the mid-2000s — and possibly even since the late 1990s.