85% of all healthcare costs in America are for those over the age of 65. America has the leading health care system for the elderly. We pay for 80 year olds to have surgeries that they can't get in Canada or France.
Nobody wants to talk about it though, because it's not a nice thing to say, that grandma is buying six extra months at a price of a million in treatment.
Socialized medicine will slice the most money out of treatment for people in that demographic. It's by far the largest savings spot. Good or bad, you can debate that endlessly; but that's exactly what will happen.