The published census data for 2017 portray the top quintile of households as having almost 17 times as much income as the bottom quintile. But this picture is false. The measure fails to account for the one-third of all household income paid in federal, state and local taxes. Since households in the top income quintile pay almost two-thirds of all taxes, ignoring the earned income lost to taxes substantially overstates inequality.
The Census Bureau also fails to count $1.9 trillion in annual public transfer payments to American households. The bureau ignores transfer payments from some 95 federal programs such as Medicare, Medicaid and food stamps, which make up more than 40% of federal spending, along with dozens of state and local programs. Government transfers provide 89% of all resources available to the bottom income quintile of households and more than half of the total resources available to the second quintile.”

The link there will take you to the WSJ which has a paywall,not sure if I would be in copyrighted violation if I posted the whole story?

Today government redistributes sufficient resources to elevate the average household in the bottom quintile to a net income, after transfers and taxes, of $50,901—well within the range of American middle-class earnings. The average household in the second quintile is only slightly better off than the average bottom-quintile household. The average second-quintile household receives only 9.4% more, even though it earns more than six times as much income, it has more than twice the proportion of its prime working-age individuals employed, and they work twice as many hours a week on average. The average middle-income household is only 32% better off than the average bottom-quintile households despite earning more than 13 times as much, having 2.5 times as many of prime working-age individuals employed and working more than twice as many hours a week.