Canada is not easily reached from south Asia, Africa or Arab countries.
You can afford to select and control immigration.
We have so far proven to be unable to.
Canada has a low overall population density. Which means that if any problems with immigrations occur, it is going to be a long haul.

However, it is an entirely different thing to have people living on welfare. With conditions applying. Or to give them money no matter what. Completely different mindset.
I have seen welfare going absurd in Denmark.
A very nice country. I like it. Know their culture. Speak their language. And I could not stand living there. Totally overwelfared.