Not sure I see anything wrong with a stable or even declining population.
With technology fewer workers produce more today than in the past.
Therefore, there are fewer people to share the gross national product of a country.
What advantage is there to import millions of people into a country?
Almost all countries currently have excess workers. Importing more people only adds to the unemployment problem, not to mention the social problems that come with imported people.
The advantage, if you're a member of the governmental elite, is that you can alter the average acceptance of government by massively importing from countries that have more acceptance of government — IOW, you could fundamentally transform
the American Spirit by importing in people who are expectant of government overreach, corruption, etc until the latter are the norm rather than the Natural Born American.
“What advantage is there to import millions of people into a country?”
So they’ll vote for more liberals and use more resources, advancing the Cloward-Pivan strategy.
It has NOTHING to do with helping the country, but to do with hastening our demise. Importing poverty and ignorance and lawlessness never helped a country.