Canada's current population level is at its highest since Confederation -- when agriculture was still 'king', and the family farm needed more hands until the 1950s and early 1960s.  Back then, schools built summer holidays into the curriculum so children could help out with planting and harvesting on the farms -- kids did NOT go to summer camps. The majority of those farms have disappeared. Manufacturing took over for a while, but trade globalization, outsourcing, artificial intelligence & new technologies mean jobs losses are mounting.  Sure, Canada can attract people from other nations where over-population has already created territorial disputes, wars and displaced populations. Potential parents have to consider opportunities for themselves & their  unborn children these days -- birth control with the objective of population stabilization makes sense, NOT more growth in numbers.
In 1804, the world's population was about one billion -- today it is near 8-billion. Time to slow down.