That is possible Toro, but unlikely. There is one big difference between USA and Canada. In USA, interest payments on mortgage loans are tax deductible, in Canada they are not. As a result, Americans tend to take out bigger mortgages than Canadians do. So mortgage losses would affect USA much more than they would affect Canada.
Indeed, when we lived in UK (where interest payments are tax deductible), we could afford to pay for our house outright. But still I took out 95% mortgage, since interest is tax deductible. I was able to invest my money and get a bigger return than the interest rate I was paying on the mortgage. With tax deductible mortgages, if your mortgage is 5% and you make 6% on your investments, you come out ahead.
Taxes may play a part but only a small part. The world experienced a global housing bubble. Some countries have tax deductibility, others don't.
It also belies what occurred in Canada a mere 20 years ago. The average price of a home in Toronto fell from 300,000 in 1991 to $200,000 several years later. Likewise, there was a steep drop in Vancouver. On the West Side, the average home was priced at $770,000 in 1996 at the peak of Hong Kong repatriation scare. 2-3 years later, it was $550,000.
Similarly, you could see it recently in very hot markets such as Calgary.
And this was only until 2006. It doesn't include the the next two years when home prices in Calgary went up even further. This is what
all bubbles look like. It does not matter what the bubble is in - stocks, commodities, real estate, wine, baseball cards.
Out west, home prices doubled in 4-5 years, yet incomes never doubled. There was a disconnect between income growth and home price increases. And the banks, despite their conservative lending, fueled these moves.
This happens over and over and over again. People always try to rationalize why a bubble is different this time. I hear it all the time. It never is.