As a Canadian I suppose it doesn't specifically affect me. However, I'd like to point out that you're generalizing about health care costs based on weight. I've been classed as morbidly obese for probably at least 20 years (not sure what the cut-off point is) and the only time I ended up draining the health care system was when I tried to lose the weight (last time). I ate too little, worked too hard, and ignored warning signs. I can't help it but it really bugs the crap out of me everytime I read an article here (in Canada) about how the obese drain the health care system. Personally the people I know who seem to be constantly running to the doctor are not even in the overweight category. Canada especially, where there are no incentives to lose weight (ie. doctor visits are free, you pay for nutritionists).
Of course, maybe I'm the only morbidly obese person who isn't diabetic, doesn't have high blood pressure, and whose cholesterol is acceptable.
(and yes, I'm working on the weight, in a better way this time)