“back then” the US only had a population of 200 million compared to today’s 330 million, and a massive labour demand since very few products were imported (contrast to Chinese made goods today). Now there’s either a shortage of everything or programs being stretched razor thin.
Food, housing, electricity, gas, rent and many other bills are extremely expensive. Our schooling, colleges, shelters public infrastructure, roads, hospitals are at constant maximum or above capacity.
We have got to help ourselves before we help others, the average American is already being crushed under the weight and costs of the modern day. Adding millions more mouths to feed and house isn’t going to help the situation.