Germany drastically increased its GDP while not growing its population over 40 years.<p>Population expansion is in no way necessary for economic expansion. The people arguing for immigration on the basis of it being required for meaningful economic growth are pushing propaganda, the facts <i>easily</i> prove them wrong.<p>Productivity gains, new inventions, new processes, stability, science, R&amp;D, sound monetary and fiscal policy - all far more important than merely increasing your population. There&#x27;s endless proof of this, see: Sweden, Denmark, Norway, Netherlands, Finland, New Zealand.<p>Or better yet, see: Japan 1974, to 1994. 10% population growth, 1000% economic growth. If population were an integral factor, their growth would have been pathetic over that time.<p>Japan&#x27;s growth problem is debt, it&#x27;s destroying the capital that would otherwise be available for investment and business formation. The collapse of their savings rate has gone in tandem with that, and has further removed capital required for investment to generate productivity gains across an economy. Most of Europe and the US are mirroring that exact outcome, having loaded up on massive amounts of debt, they now find they can&#x27;t grow beyond extremely low levels. China is in the process of joining that club as well. You can have growth or tons of debt, you can&#x27;t have both together for long.