I have seen some of the results of life-prolonging drugs. All that they do is prolong suffering. If the patient wishes to discontinue such treatment, family members, overcome by guilt/compassion work on the patient to not "give up". In some cases, when a patient dies the family overrides the living will. They demand that resuscitation be administered, so that the sick person can suffer a little more in the hopes that a cure will be discovered during the interim.
There is such a thing as "quality of life" -- I opt for quality over quantity, and believe that there is a point at which the medical establishment ought to stop "selling" patients and their families on experimental treatments and/or "cures", and allow them to die with dignity.
Yes, I believe the time has come for a National Health Service in the USA. Why? Because for much of my young life I could not afford to seek medical or dental care due to the need to either pay up front or present evidence of insurance (which I could not afford). I have seen others delay medical care to the point where a simple problem escalated into a serious, life-threatening one.
"Health care, free at the point of delivery" -- Yes!