UW engineering tuition is through the roof now. It's so bad now that I'm not sure what I would've done had I had the unfortunate luck of being born 3-4 years later. Breaking even with co-op is out of the question for a lot of students, though it still helps a lot.
After all, without co-op, for most UW engineering programs you're now looking at $40-45K tuition + living costs + supplies/books... A $80-90K loan is not at all out of the question.