The AARP put out an entire issue of their magazine about health care. It was thoughtful and they spoke openly about how they had lost members because as a group they decided to stand for reform and coverage. They spent a lot of pages explaining their reasoning.
I rarely agree with razorsharp - that name! - but it's true that polls show the main sources of opposition to healthcare reform are people already receiving government health benefits, particularly men.
BTW, as noted in Nicholas Kristoff's column in the NYT -
here - the US lags the world in most health indicators until we get to those of an age to receive Medicare because then we have universal coverage.