Because Canadian employers are particularly fearful of accepting the qualifications of anyone trained overseas (with the possible exception of medical doctors trained in the US or the UK).
This makes a mockery of the federal government’s professed interest in attracting highly-skilled immigrants, and means that experienced heart surgeons work as nursing assistants, or professors of economics work as taxi drivers.
(My answer to this question at Quora.com)
The landlord will phone you and say:
I don’t know where you are, but what I do have are a very particular set of skills. Skills I have acquired over a very long career. Skills that make me a nightmare for people like you. If you pay the rent now, that’ll be the end of it. I will not look for you, I will not pursue you. But if you don’t, I will look for you. I will find you. And I will demand that you pay up, eh?