

Not complicated or difficult to understand.
Poor have more children, because poor are generally more uneducated, especially in 3rd world countries. It is the more informed and educated that are having less children. People that are more informed and educated, generally think long term, and don’t just succumb to immediate gratification. Immediate gratification for someone who is poor, the cheapest thing is sex, and unprotected at that.
Not to mention less educated people are more easily indoctrinated into devout religious beliefs. And the abrahamic religions and it’s offshoots all strongly encourage having children.
It’s really not that complicated.
They will get bailed out.
The people who vote Republican, and vote trump. They scream and screech about government spending. They complain about helping people with food stamps, free school lunches for kids. They reject Medicare for all and relieving college tuition debts. They vote to give tax decreases to billionaires who have 500 million dollar yachts, multiple hundred millions dollar mansions that sit empty, Lamborghinis that just sit there and never get driven.
They’ll get bailed out with tax dollars. And they’ll continue being hypocrites until they die.