A common right-wing criticism of Medicare that I was trying to pre-empt is that it is rife with waste, fraud, and abuse.
But to directly answer your question: if you want your dollars spent effectively, you should care about fraud rates in services you pay for (public or private).
Alright, well I guess I'll take your comment as an attempt at a real conversation. But fraud in the medical industry isn't really something that crosses my mind, nor is it part of my concern about the government dictating my healthcare.
Medicare not only covers the most at risk of our population, but is also by far the cheapest per capita beside medicaid. Yes, American health care is expensive, but medicare is the cheapest way to deliver it.