I haven't read all the replies although tend to agree with one comment I read about the kids there knowing nothing about what poverty and going without really means. (I have also lived, and visited many times, almost all the places I have read about there being problems in the UK, mostly the London areas).
I think these problems are partly the fruit of a society that refuses to administer (in fact bans it) any type of discipline of children so they can learn a bit of respect for others (amongst other things). And I am not talking about spankings (necessarily) but even just requiring kids to exercise a bit of self-restraint or they lose any privileges. What do you expect of a bunch of kids who are never taught how to behave?