Sixty-two percent of jobs fall short of that middle-class standard when factoring in both wages and the cost of living in the metro area where the job is located, according to the study by Third Way, a think tank that advocates center-left ideas.

“There’s an opportunity crisis in the country,” says Jim Kessler, vice president of policy for Third Way and editor of the report. “It explains some of the economic uneasiness and, frankly, the political uneasiness” even amid the most robust U.S. economy and labor market since before the Great Recession of 2007 to 2009.

A slight majority of Americans, 52 percent, do live in middle-class households, according to recent annual reports by Pew Research Center. And another 20 percent or so live in upper income households. But that’s because they’re juggling multiple jobs, for example, or relying on investments, an inheritance or other household members who may have higher-paying jobs.