This sounds like a massive exaggeration to me. Do you have any citation to back up these claims?
[1]https://www.theweek.in/news/world/2020/06/22/american-dream-...
So it seems plausible -- but these aren't people cynically exploiting Canada as a hop on the way to the US, they're people who were born outside Canada but moved to Canada as children and grew up Canadian.