Obviously, one cannot generalize about "The Poor" or about "The Rich." Every circumstance is different.
Having said that, however, our governments at various levels have, in the interest of being "compassionate," created a cornucopia of programs that tend to permit people to make disastrous personal choices in their lives without having to fully bear the consequences - thus perversely encouraging those disastrous choices. Most prominent among these choices - it almost goes without saying - is to bear children out of wedlock. As Star Parker attests, all she had to do was pop out a kid and the Gub-mint was going to ensure that she was provided a meager existence, at the taxpayers' expense. Cash payments, food stamps, subsidized housing based on income, paid medical care, and who knows what else.
And yet the vast majority of the population understands that bearing an illegitimate child - particularly when the extended family has no surplus resources - condemns both the mother and the child to a life of poverty and want, almost regardless of what she might do after bearing the child. So it is not unreasonable to expect The Poor to recognize the reality of generational poverty and act accordingly, particularly when the means of preventing unwanted children (even assuming that periodic copulation is a fact of life) are readily available.
But the "Liberal" culture has succeeded in removing the social stigma from bastardy - indeed it is considered "normal" in many circles - when that stigma served a very important societal purpose. Is Jesse Jackson telling young Black women to STOP HAVING ILLEGITIMATE CHILDREN??!! Consider the lyrics of the old Supremes' Hit, "Love Child."
"No child of mine will be bearing the name of shame I've been wearing, 'love child'" (aka, "bastard").
I frankly don't get out much from my isolated suburban enclave, but the most disturbing thing I see when I do get out is not the small army of homeless people hanging around on the streets, but rather the larger army of mainly-minority adults in their 20's 30's and beyond, working menial, dead-end jobs, remembering how much I struggled when I was at that stage of life. But I know that these people don't have the intangible resources that I had to impel me to pursue an education, structure a career, and slowly accumulate the resources that make life comfortable when you get a little older. These people will, in all likelyhood, struggle for their entire adult lives, and end up with no more accumulated wealth than they started out with. It's depressing, actually. And there ain't no government program gonna help them in any significant way.