Demographic Time Bombs

I've never quite understood the obsession with the idea that changes in the age composition of a population will have drastic consequences. I've read a million articles explaining why and they never make any sense to me. But to the extent that people do worry about such things, the answer is quite simple: open the borders!

This fast-graying nation of 81 million is facing a demographic time bomb. With a morbidly low birthrate and a flat-lining population, hundreds of schools have already shuttered. Some neighborhoods, particularly in the increasingly vacant east, have become ghost towns. For Germans, it has raised a serious question: Who will build the Mercedes and Volkswagens of tomorrow?

Yes demographic change, like just about any other changes, will have effects that won't all be positive, but it's hardly a country destroying phenomenon.