The income inequality in the US is not that visible in day-to-day life. A large fraction of the income inequality is a side effect of the scale of US geography. The States with the highest and lowest median incomes are separated by 2x income and 1500 kilometers. It is also worth pointing out that even the poorest US State (Mississippi) still has a median income that is the same as Germany, so "poor" is relative.
Different States have different economies due to geographic locale, history, and specialization. Consequently, the US has States that specialize in agriculture, manufacturing, services, technology, natural resources, etc which have very different economics and compensation structures which is reflected in local incomes.
The median income is much higher in Washington than Mississippi, for example, but that doesn't imply anything about the distribution of income within those States. It would be like comparing incomes between the Netherlands and Romania.
Closer: San Francisco: Montgomery Street business district vs Tenderloin district
Even closer: Mission District -- Mission and 16th Street. Walk east one block and you reliable find used needles on the street. Walk west two blocks is quickly wealthy.
New York City: Manhattan vs Bronx
Closer: Upper East Side vs East Harlem (125th Street and above)
All of these pair are close and would surprise many by the huge gap in quality of life between both of them.
This one should be like catnip for HN: Palo Alto vs East Palo Alto
Different States have different economies due to geographic locale, history, and specialization. Consequently, the US has States that specialize in agriculture, manufacturing, services, technology, natural resources, etc which have very different economics and compensation structures which is reflected in local incomes.
The median income is much higher in Washington than Mississippi, for example, but that doesn't imply anything about the distribution of income within those States. It would be like comparing incomes between the Netherlands and Romania.