While researching my article on Soviet economic performance relative to the US (it was bad), I came across this fascinating graph showing income inequality in the USSR since 1946.
As you can see, the 10% richest Soviet citizens in the first postwar year were more than seven times as rich as the 10% poorest. That is actually substantially higher than in many capitalist social democracies today: Czech Republic (5.2), Finland (5.7), Germany (6.9), Japan (4.5), Sweden (6.2). Russia’s current R/P ratio is about 13 IIRC.
And there’s lots of factoids that support this assertion:
(1) Stalin increased his own salary as General-Secretary from 225 rubles (until 1935), to 500 rubles in 1935, 1,200 rubles in 1936, 2,000 rubles by the end of the war, and a cool 10,000 rubles by 1947.