Because thats not how we roll
This has been a crazy 3 days, it's now countrywide, not just London. Birmingham's main city centre street was having major high street shops looted in mid day, no police anywhere. People have been literally STROLLING out of major store with armfulls of TV's. In London, one city centre street was being looted for 2 AND A HALF HOURS and no sign of police anywhere. That's hard to get your head around.
What you basically have here though, is a modern society in which poor people live surrounded by wealth and materialism that non of them can afford. And they've snapped.
Martin Luther King jr:
"There is nothing more dangerous than to build a society, with a large segment of people in that society, who feel that they have no stake in it; who feel that they have nothing to lose. People who have a stake in their society, protect that society, but when they don't have it, they unconsciously want to destroy it."
Martin Luther King Jr