It is a free market though, it's even advantageous to people who don't have that much money because they can still get a mortgage without a huge downpayment. Back before CMHC mortgages were private loans, the previous owner would be the one financing the new owner at whatever rate they felt was appropriate and at whatever downpayment they felt was appropriate. Today you need 5% and if your credit score is good enough then the bank can't say no.
But you wouldn't know that because you're in Europe and you're here talking about the Canadian housing market like you had any idea how it works.