It does become a very difficult decision to make: do you cut spouses in favour of more parents?
I agree with you that it's important for children to be able to see their parents and grandparents, especially in their ailing years when they're not feeling well.
Is there anything stopping Canadians from visiting their parents or grandparents in other countries? I know thousands of Canadians go every year, whether it's to India, China, the Philippines, to visit their families. Is there anything stopping them from visiting parents who may have filled in their applications and are waiting to be sponsored?