No, it's a lot simpler. Governments should just have babies of their own, using donor eggs and sperm of people they consider to be high-value, using cheaply hired foreign women of any race for gestation, and raising them in specialised institutions - and funding it by abandoning all (indeed terribly inefficient) family-stimulating policies like childcare, tax benefits, etc.

To avoid political problems, make sure these new people do not become citizens so they don't vote, let them just be workers and consumers.