Im not rich, but i get by, and can say i live a decent life (in terms of what i can get "with fiat"). Im from a totally normal middle class-ish family. I always worked (since like 14-15) and got my own savings started when i was young. I really cant think of why you could not get out of beeing poor, IF you have the wits and willpower. If you grind some shithole job for 6 bucks/hour you should think really hard on you…
"Im from a totally normal middle class-ish family." Maybe that's why you can't comprehend the idea of being poor in a fashion that doesn't let you escape, even working as hard as you possibly can and making all the right choices.
It usually boils down to alcohol/drugs, idiotic credit card debts and/or living way beyond your actual capability to sustain that lifestyle, and having zero savings, and possibly having children way too young.