Frankly, it does not seem that 'Pop. size' actually determines the 'success' of a country... Attitude does.
Integrated patriotic respect by ALL Cdn Citizens for Our Nation & its People is critical under one Flag..
Therefore, Canada, the country 'feeding you -- not breeding you'  does not require 'cultural engineering, nor divisive balkanizing multiculturalism', just blending of ALL, sans 'bias. 

Canada's Pop. sits mainly along the 'northern 49th parallel' where Canada's arable [read: desirable] land resides. Canada's Mgt. of resources, species & citizens is not solely based on Profit & Lo$$ answers.
Canada's Full Natural Life (Plant, Animal, Insect, etc) should be part of a Cdn Pop. Q.."how much is too much"
Why?
(c)"The world is expected to add another billion people within the next 15 years bringing a total global pop. from 7.3 billion in mid-2015 to 8.5 billion in 2030, 9.7 billion in 2050, & 11.2 billion by 2100 according to new estimates from the UN"(c)Google)

Planetary Suicide.