I think this is related to the topic and I'm not trying to offend anyone, but I think it's a lot harder and hence much more undesirable, than it used to be to be "poor," since our ethnic/racial neighborhoods have been broken up (of course, that's not the only reason, but I think it is a big one). They blame freeways and cars for the flight to suburbia and "exurbia," but I think the real driving force was "white flight." In any case, it has made it a lot more expensive, than it used to be to live in a decent, clean and safe neighborhood. Hence, I think, creating a greater social stigma for poverty, particularly among "whites." That may have something to do with the negative attitude towards welfare recipients, particularly those who are white.
There also appears to be some hardening class lines among whites, that I don't think were as noticeable in the past. Of course, that's probably because the middle class is shrinking and there's some resentment there and some gloating.