He takes a long view on these issues, and he is right.
What does it matter if you call a place Scotland when there aren't enough Scots to support it?
We may be getting to a point where countries will be competing aggressively for fertile immigrants. "Come to Scotland we'll give you more goodies"
I don't think such a policy will ever work. The point in having a high birth rate is to get a bunch of tax dollars from the newbies to pay for the welfare subsidies of the oldies.
But if you have to spend too much to lure in the newbies, then you don't have any left over to give to the oldies. This is what is happening in France where all of the subsidies they do give out (including paying moms to stay at home to take care of their kids) is still less than what most women want to forsake a career. Any more money spent and it will be a wash.
The only potential way out I see is a free market where it is possible to die in poverty. Some people will have kids just to maks sure there is someone to take care of them in their old age.