It was interesting to learn about a concept that the countries economy should grow according to its population growth. Now I see a point why developing countries like China, India  grow faster than developed countries like Canada.  But I think if this population growth factor is discrete and not continuous, because those who are just born even if contributed in the counties population growth still cannot contribute in the GDP growth until they turn at least 14 or even 18 years of age and start earning.  So the countries GDP growth should take into account this delayed factor and grow at a faster pace than the growing population that was before 14 or 18 years. Does this make sense? And I think that is why Canada tries to import more adult people as immigrants to correct this delayed factor to adjust and fast track the GDP growth. But it needs to be efficient by making sure that each adult person invited inside to contribute in the GDP growth should get employed and should be earning at least the average income equal to the per capita GDP of that particular place/city in which they are living. Also the immigrants and existing citizens need to feel comfortable mutually and socially so harmony exits within the growing communities. This sounds like a so interesting system and must requires tight control strategies to be designed, implemented, tested and verified and adjusted dynamically.