In my understanding becoz Canada & US are the same region as UK & Ireland and Australia & newzealand.....they go in the same direction. If things good with US so with Canada and if things are bad with US so with Canada!!!
As we know things arent good between Pakistan and US, it is also effecting our visa applications as well. The diplomatic relations between countries impose great effects on visas and entry permissions....
In relations to other countries like Aus, NZ, Ireland, UK etc. they take oversease students as billion dollars making industry and they can not let it off with no reason considering the fact of economical down turn....on the other hand in US/Canada, they have more than enough students to take care of this industry.
Solution: students from every part of the world not only from Pakistan to come out of their shelters and protest against canadian govt on slowing down in processing study visas. In addition students should also boycott applying as well. This should also be done by students within Canada as well....Im sure, turning down of the industrial income would definitely worried them up.