It is true, perfection shall remain elusive. You can't please all of the people all of the time. That said, more equitable systems with far higher qualities in terms of environmental impact, resource consumption and sustainability, as well as fundamental service availability are clearly within reach.

You raise a particularly good point about the overall properties of systems for mass medical care, but people don't live forever. Cancer is one answer. Solutions that reduce or delay post-facto treatment with holistic and pre-emptive approaches (better regulation, better education, better diets/life choices) may be another.