The richest live the longest, and the middle class lags behind even when income rises, scientists have learned this from the example of Sweden. Why does life expectancy not grow evenly in a developed society?

The problem of income inequality is one of the key areas of research in contemporary social, economic and political sciences. Over the past decades, the number of scientific publications on the subject has increased tenfold. In recent work, a group of Swedish scientists concluded that in their country the decline in economic inequality between different groups of the population has not resulted in an increase in the life expectancy of the less w…