The first significant point is this: "The key to understanding why people riot is not poverty – it is injustice."  In this case, the most pressing, acute injustice is that of police repression and institutional racism.  But the class injustices resulting in high youth unemployment, concentrations of poverty, almost static social mobility, and urban degeneration, are present here as well.  This is evident in the rioters' description of their motives in media interviews.