The Gini Coefficient measurs inequality in countries (en.wikipedia.org/wiki/Gini_coefficient). A high Gini coefficient means high inequality. The lowest Gini coefficient among industrialized countries has Norwegia with 19, many countries in Latin America are high upto 60, the extremest measured values. China went up from values in the 20 during communism to a 44 by the Deng reforms (en.wikipedia.org/wiki/List_of_countries_by_income_equality) The West European Countries have lower Gini coefficients than the USA.
I dare to make an hypothesis: there is no recipe for a correct stand in social policy. It obviously needs to be different in countries with high or rising gini coefficient than in countries with low or falling gini coefficient. I would like to know how many politicians in the PD ever heard about it. (The Italian is obviously quite low)