Before people continue about the "woe is the German economy" crap, especially the liberal-bashing comment- remember that Germany today is the fourth largest economy (Behind China, USA, and Japan), the third largest importer/exporter, and has a trade SURPLUS of 19,600,000,000 Euro. It has one of the most sophisticated and efficient manufacturing sectors in the world. Whereas the US manufacturing sector has not been all that impressive with only a 29.4% tax rate for Americans, the German manufacturing sector has seen explosive growth with an effective tax rate of 50.9% (please tell me again how lower tax rates create more jobs and high tax rates kill them, I need a laugh). Germany has one of the highest tax rates and an unemployment rate of only 4.7% (April 2015) compared to 10.5% France and 5.5% USA. Germany is second only to the USA in being a destination for immigrants.
Why would Germany need an increase in population boom? They have all the workforce they could use and then some with immigrants (and its not like Germany has a good history with immigrants or non-Germans living among them). The idea that a bigger population leads to a bigger economy is false. Even for an export-led/service economy like Germany's it won't make the economy big enough to support the extra people, and kids are expensive and it cuts down on the people's savings. What makes Germany a powerhouse is their ability to have technical and educated workers, all those kids all wanting to go to college/polytechs can be a strain and there won't be enough jobs for them. And what if by some unlucky chance this population boom for whatever reason ends up having more men than women? Do you know what countries do with a large male population that can't find a wife or a job? Hitler wasn't the first one to come up with an idea as to what use they can be.