Because government views citizens as resources, it only makes sense that those advocating for government-run health care would start to contemplate the usefulness of an old person.
Good point.
One would like to think that the nefarious "science" of eugenics died out over 60 years ago, with the defeat of Nazi Germany. But when serious (?) people advocate our allocating scarce medical resources on the basis of age, physical condition (i.e. the presence or absence of chronic diseases), and mental condition, it would seem that the Dr. Mengeles of the world are still among us.