Americans often move between different income brackets over the course of their lives. As covered in an earlier blog post, over 50 percent of Americans find themselves among the top 10 percent of income‐earners for at least one year during their working lives, and over 11 percent of Americans will be counted among the top 1 percent of income‐earners for at least one year.
Fortunately, a great deal of what explains this income mobility are choices that are largely within an individual’s control. While people tend to earn more in their “prime earning years” than in their youth or old age, other key factors that explain income differences are education level, marital status, and number of earners per household. As HumanProgress.org Advisory Board member Mark Perry recently wrote:
The good news is that the key demographic factors that explain differences in household income are not fixed over our lifetimes and are largely under our control (e.g. staying in school and graduating, getting and staying married, etc.), which means that individuals and households are not destined to remain in a single income quintile forever.
According to the U.S. economist Thomas Sowell, whom Perry cites, “Most working Americans, who were initially in the bottom 20% of income‐earners, rise out of that bottom 20%. More of them end up in the top 20% than remain in the bottom 20%.”
While people move between income groups over their lifetime, many worry that income inequality between different income groups is increasing. The growing income inequality is real, but its causes are more complex than the demagogues make them out to be.
Consider, for example, the effect of “power couples,” or people with high levels of education marrying one another and forming dual‐earner households. In a free society, people can marry whoever they want, even if it does contribute to widening income disparities.
Or consider the effects of regressive government regulations on exacerbating income inequality. These include barriers to entry that protect incumbent businesses and stifle competition. To name one extreme example, Louisiana recently required a government‐issued license to become a florist. Lifting more of these regressive regulations would aid income mobility and help to reduce income inequality, while also furthering economic growth.