You do understand that "the Bank" is the Bank of Canada which will not lose any money regarding mortgage defaults. All that the government loses would be taxes on the banks' income lost due to mortgage defaults.
In our complicated and biased economic system, the banks will squeeze every penny they can out of home owners and write off losses on mortgage defaults by institutional investors and well connected individuals. Banks were, maybe still are, among the largest owners of farmland on the prairies.
The Trudeau government brought on new rules to make it harder for individuals to get mortgages by requiring them to be able to pay mortgages with a higher interest rate than they were getting. What is happening now is like a light shower compared to 1982.
The bank will do all it can in inflated means to make an extended profiteering activity ... you can bank on it as a mess of muskrats ...