List of Countries by Inequality-adjusted Human Development Index
en.wikipedia.org
en.wikipedia.org
This is similar to assigning a logarithmic utility to income, life, and education and estimating the loss from inequality by looking at the difference between the computed utility and what one would get if income, life expectancy, and education were constant across the population.
I once did a calculation like this for income over the last century, and noticed that although inflation-adjusted mean incomes have risen since the 1970s, once inequality is accounted for, that rise disappears.
[1] http://hdr.undp.org/en/reports/global/hdr2010/papers/HDRP_20...