I'm not sure if most of the commentators here are joking or just being too subtly sarcastic, but truly the best
predictor of a person's success is the success of his parents during his formative years. It's not a hard-coded rule, but it's statistics: if, given two persons of equal age, gender and health, you would have to bet how they turn out, your best bet would be to look at their parents and assume the same will happen to them, and
not to give them an IQ test and draw a conclusion from there (on average, everyone has an average IQ).
So, yes, while there are always exceptions, poor families will mostly yield people who will not move away from poverty.
It is as unreasonable to say to those people "move out and get a better job" as to say to a clinically depressed person "oh cheer up, it's all in your head": no, such problems are actually not the problems of attitude and positive thinking, but have external causes and factors (i.e. external to the mind).
One example of such a factor could be poor work habits learned from their parents - but still it's a trait derived from those particular parents. Unless the person sees or learns about "better" work habits somehow, he will in all probability not conclude that is one of his problems all by himself.
So, yes, while there are always exceptions, poor families will mostly yield people who will not move away from poverty.
It is as unreasonable to say to those people "move out and get a better job" as to say to a clinically depressed person "oh cheer up, it's all in your head": no, such problems are actually not the problems of attitude and positive thinking, but have external causes and factors (i.e. external to the mind).
One example of such a factor could be poor work habits learned from their parents - but still it's a trait derived from those particular parents. Unless the person sees or learns about "better" work habits somehow, he will in all probability not conclude that is one of his problems all by himself.