The culture to which you refer actually came after the welfare state,
and I believe the left intentionally targeted the black population (community organizers or whatever they were called back then) for dependency, because they viewed them as inferior sub-humans incapable of thinking for themselves.
The culture I'm referring to is alive and well in Kenya and a large portion of Africa. Not much Welfare going on there. It's not unique to America - you see it in Nigeria, Haiti, and pretty much anywhere you find a large Black population. It's a culture of laziness and victimhood.