Calling the US "developed" is a little stretched. Have you seen a trailer park? The US is like India - rich enough to have a space program, yet millions live in abject poverty with no health care.
As someone who grew up in Baltimore in essentially a ghetto, I can tell poverty in the US is not "abject" or comparable to abject poverty in many developing countries. When I was growing up, people on government assistance had free school lunches, food stamps, cheese, free public education, sanitization, postal service, water, access to quality emergency care, most had telephones, TVs, and other creature comforts. And you're comparing this with people leaving on less than $1 a day?
The UN says: "Extreme poverty, deep poverty, abject poverty, absolute poverty, destitution, or penury, is the most severe type of poverty, defined by the United Nations (UN) as "a condition characterized by severe deprivation of basic human needs, including food, safe drinking water, sanitation facilities, health, shelter, education and information. It depends not only on income but also on access to services"
I'm a progressive, and of course I want universal single payer, subsidized daycare, or free pre-K, free college, etc. But to compare the current state in the US to a country with vast swaths of people who die of cholera is ludicrous.
US fertility is below the replacement rate at 1.73 births per woman, the increase is coming from immigration, so the US per-se isn't contributing to net population growth and arguably, when immigrant women come to the US, they are converted in 1 or 2 generations from high fertility rate to low fertility rate due to education, career, standard of living and culture changes.
