Yes, the leaders of USSR could do that and did just that, but I don't understand what this has got to do with any challenges to the original assertion that large quantities of people worldwide would be "very grateful to relocate to Georgia" - they would be. At the moment despite all the immigration restrictions that USA has implemented, the Green Card queue indicates a mass willingness to become residents of USA.

It's not about boasting, it's about whether USA can rely on people wanting to immigrate to ensure that places like Georgia stay sufficiently populated even if population naturally declines - and IMHO they can.