You can take any point in history and find a group of people who are up for a good fight.
If this is political, what exactly is it that the looters are fighting for? "I am taking this laptop from this store because there isn't enough computer access at my local library?"or "If only some inspirational teacher had inspired me I would have known how to apply for a library card" or "I am burning this building as a comment on depleting energy resources".
I agree that being bored and disconnected from society increases the likelihood of violent unrest, but I think this is mob mentality fuelled by mobile phones. They are doing this because it gives them a rush. Perhaps if they had a bit more money, they would have joined the Bullingdon club or if they had been around in the eighties they could have got into football hooliganism.
However the idea that some big amorphous 'them' had the power to make everything better, but failed and this caused the current riots is nuts. Maybe I'm out of touch with youth, but some people appear to be out of touch with what the human beings who make up the government, police, civil service, social services and education system have it in their power to do.
The UK isn't perfect, but was it better when we had work houses, or people were rounded up off the streets to join the navy, or when a third of the population were wiped out by the black death? (Of course, there were riots then too). Are there better countries to live in? Is there some point of niceness we can reach where people who enjoy riots say "OK everything is just lovely, I no longer enjoy having a ruck?".