Is income inequality real or is it just politics ?

A chart depicting income inequality according to Thomas Piketty

From the Cia.gov World Factbook

Distribution of family income — Gini index measures the degree of inequality in the distribution of family income in a country. The more nearly equal a country’s income distribution, the lower its Gini index, e.g., a Scandinavian country with an index of 25. The more unequal a country’s income distribution, the higher its Gini index, e.g., a