Anyone who says the riots don't have anything to do with the cuts should have a read of 'Austerity and Anarchy: Budget Cuts and Social Unrest in Europe 1919-2009’, a discussion paper issued under the auspices of the Centre for Economic Policy Research's international macroeconomics programme and currently doing the rounds on Twitter, which looks at the relationship between budget cuts and civil unrest across Europe since the end of the First World War:

The results show a clear positive correlation between fiscal retrenchment and instability. We test if the relationship simply reflects economic downturns, and conclude that this is not the key factor.

So much for 'criminality pure and simple'.