Absolutely! I knew a very nice couple in my old village who had three children of school age but were still very young themselves - they must have been parents by 20 or 22 I would say. They had working class accents, albeit nice ones IYSWIM! They lived in one of the 'nicer' most desirable roads in the village, in a very very nice modern 4 bed detached, and most of their neighbours would have been middle management, small business company directors, accountants, etc. Although I knew them vaguely from school I didn't really get to speak to them until they turned up at the same (quite expensive) holiday resort as us. In the course of conversation I asked him where he worked and he said at Kwikfit. I (to my embarrassment said, 'Oh, are you a branch manager or something?' and he said (without batting an eylid) 'No. Just a fitter'.
Well, me being me, and very polite, just left it, but I was a bit bewildered. A few months later, appropo(sp?) of nothing, someone who knew them well told me that when they were very young and first married in some housing association hutch in some horrid town that I wouldn't touch with a bargepole, they won a substantial amount of money with Readers Digest. (Yes, folks, some people really do win those!)
The thing is, that they were the nicest people, quite strict with their children, and their children were far more well mannered and beautifully behaved than some of the more middle class children I know! The scary thing is, that without that Reader's digest money they would have been the same people but with a very different lifestyle, and to my shame I may have viewed them differently, or made unfair assumptions.