The US already has a 2-tiered medical system--those that can pay for the $1 million dollar life extension at the end of life and those who can't. It's called adequate insurance. (unless you're super rich and can pay for it out of pocket, like Bill Gates)
Whether that's right or not depends on who's willing to spend other people's money for themselves, not the comparison to the salaries of x number of teachers. We have to be able to say as a society that enough is enough in QALY dollars (my current cut off for a reasonable number is $5k-7.5k for 1 year of life).
The British have their NICE, but nothing like that will fly here, short of universal health insurance. People will call it the "death panel." (They used to call it the God panel, who decided on who gets dialysis or not, and they did away with it by allowing Medicare to pay for dialysis, with the wrong assumption that dialysis patients will be a minority of patients. Guess what, the dialysis population has skyrocketed and expends far more Medicare dollars than your average Medicare patient. It's good for nephrologists and commercial dialysis units.)