I believe there will always be informed criticism of the distribution of wealth... to say nothing about griping about the inequity of one's own slice of the pie.
Globally, I see desperate migration, as well as populist (anti-elite) politicians. The populists all seem to say that "somebody must be blamed", but they differ over who should be the ones to blame.
Here is a link to a 1937 radio address by Father Charles Coughlin. By one estimate Father Coughlin had a following of 45 million listeners: "Somebody Must Be Blamed" http://www.historymatters.gmu.edu/d/5111