And now less than half a century later, there are even people who are worried about falling birth rates in some places, because apparently it's concerning if we don't keep growing the population at the same rate.
Maybe we'll have a billion humans living in orbit in a century. Unsure if they'll be willing to pay Earth Tax though.
At small scales you can have them give up their culture and assimilate but at replacement scales you just turn your country into a third world country. That's completely unacceptable.
One is invited, the other is unwanted.
No one wanted or invited any of that.