It is true since:
(i) A small number of ultra rich enjoy a disproportionate share of wealth and income. Not only that, their share in the total income of the country has been increasing.
(ii) Those at the bottom of the society have very little to depend upon. Their incomes have been declining.
(iii) Sometimes, they find it difficult to meet their basic needs of life, such as food, clothing, house, education and health.
In actual life, democracies do not appear to be very successful in reducing economic inequalities.