There's something to be said for dying from a massive heart attack while riding your bike.
If my doctor said, I keep in alive and bed ridden for the next few weeks, but it will mean feeding tube, and ventilator, and probably a couple of surgeries, plus it will cost the taxpayers a $100k, I'd probably ask what my other options are.
I agree completely. But, the question always revolves around who makes the call, and informed consent. If the government becomes involved with a pecuniary motive (early death cuts costs, that has to be noted and factored in.