In fucked up places, people just live day to day and are in survival mode. I believe I have once read something that goes along the lines of “poorer demographics generally have tendency to make more children because they think that more children is the most sure way to secure their near future for when they get older”

I think it's simpler than that. Nothing to do when you're poor and overworked so you just fuck. Oh, and less caring about the consequences.