European countries bring income inequality down with taxes. North-American countries: not so much.

Income inequality (gini index) in OECD countries in 2014, before and after taxes. A gini index of 0 means that every household earns exactly the same income, while an index of 1 means that one household in the country makes all the income. The lower the Gini index, the more equal the income is distributed in a country.