At the same time they also recognize the dual intent... You may have come for education, but if you saw that you really like living here and have a job offer, who says that you have to go home?
The problem is when students come with study permits, then drop out and get jobs below minimum wage or "under the table" money...
A legitimate student who has canadian education, has been living for years here, contributing to the canadian economy, has way more chances of being successful here in the long run!
So what you suggest shows ignorance, nothing more!