>Sure. The question is why they didn't do that until ~1970, which is when I think that era started. I'm American so I can't speak to the specifics of what happ

>Sure. The question is why they didn't do that until ~1970, which is when I think that era started. I'm American so I can't speak to the specifics of what happened in Canada, but I imagine it is similar to what happened in the US. It is all related to the post-war suburbanization of the population. In the early part of the 20th century, homeownership rates in the US were in the 40% range. By the 70s it jumped to roughly 65%. Large swaths of the population went from being lifelong renters in cities to buying single family homes in the suburbs. Owning a home became a symbol of American middle-class life and the government both supported and encouraged this transition. Obviously a constituency that makes up 65% of the population is going to see more political power than one that only makes up 45% of the population.