The US is a developed country, not a developing one. The world's population will continue to increase for the rest of this century up to 9 billion from the current 6 billion. We have 54 million Americans today between the ages 16-64 who are not working. We can still meet our need for workers if we reduce, not increase legal immigration. The average age of today's immigrant is 29. Under current immigration policies we are bringing in non-workers due to etended chain migration, e.g., aged parents and relatives of immigrants. And as the Rector study demonstrates, we are importing poverty.
“The US is a developed country, not a developing one.”
I meant “developed”, as the “developing” countries do not have declining demographics, yet.