Sure, i don't want to pay for fat people's, alcoholic's, drug addict's, smoker's, and etc...s health care. I already do to some extent, but i would even more so under a UHC plan.
PS: having an institute to to evaluate medical treatments and having UHC are NOT mutually exclusive. The point is that if we bring costs down 50% there is no need for UHC. Do you not get that? The current system would be worse under UHC than it is without it, as it does nothing to address the actual major costs of health care in the United States.
PPS: expense is everything.