"Among households headed by high school dropouts, incomes grew roughly in lockstep - and were basically stagnant at all levels. Among households headed by high school graduates, and in those headed by college graduates, those in the middle actually saw their wages fall. The only group that saw significant gains was households headed by high-earning college grads. Labor economists call this "the hollowing out of the middle." Globalization and technological change have made middle-skill, middle-income jobs harder to find. Low-skill, low-paying jobs have stuck around. And there are high-paying jobs for those at the top with the skills to put technology to profitable use." This article talks about how higher-income families gradually get more, and middle- and lower-income families gradually get less. It also discusses how, in the past 40 years, the problem is getting worse and worse.

"Among households headed by high school dropouts, incomes grew roughly in lockstep - and were basically stagnant at all levels. Among households headed by high school graduates, and in those headed by college graduates, those in the middle actually saw their wages fall. The only group that saw significant gains was households headed by high-earning college grads. Labor economists call this "the hollowing out of the middle." Globalization and technological change have made middle-skill, middle-income jobs harder to find. Low-skill, low-paying jobs have stuck around. And there are high-paying jobs for those at the top with the skills to put technology to profitable use." This article talks about how higher-income families gradually get more, and middle- and lower-income families gradually get less. It also discusses how, in the past 40 years, the problem is getting worse and worse.