George Osborne's nickname was "oink" because of the school he went to, he's hardly poor.
I don't begrudge anyone success, it is tiresome though when they offer their experiences as a prescription for success.
Often such tales of childhood poverty when examined are grossly over exagerrated, if you were born in the 70s (like I was) then most people had very little, if you grew up in the 80s in the north (like I did) then you got to see hardship and disenfranchisement (I even got to read the slogan "yes it hurt, yes it worked") noone's that interested in the kick me hard sign that was slung on your back at birth, to my mind once you become an adult, you cope.
Class is very difficult to ascribe to any one group, British politics is decidedly middle class (I feel) that's why it's an offence to smoke in a pub but you'll get a suspended sentence for theft.
There's people I know who've left the saddle and gone checking, often the story will be told that they were owl a r s e s on the road, which is often untrue (bar one), a bloke I started with is a boss now. he's earned his stripe I can't begrudge him that, but, to a man with nigh on 40 years service he told him casually (and wrongly) that were was no longer a job for him, hands behind his head "well, it's the credit crunch and all that..." he said.
If nothing else class can't be bought.