In the UK a lot of the Middle East protests (the so called Arab Spring) was shown as a protest mainly due to food prices. My opinion is just that these people now feel empowered so there will be a lot more protests in the next few years.
Interesting that you mention the cause of the riots, just today on the BBC there was another explanation of the cause of revolutions - http://news.bbc.co.u...000/9757181.stm
So maybe the Americans here should be wary of 2020.
Of course, any outside observer can see that the current distribution of wealth and work in the USA is untenable. There will be a people's revolution. It will be hillarious.