Maggie's Farm

I think it matters to separate "healthy living" from "preventive care" from "early screening". These are linked but distinct concepts.
Healthy living will make most people feel more vigorous and energetic for longer. This is primarily a matter of choice. Reasonable diet, reasonable exercise, fulfilling activities and relationships. No government or even medical elements.
Preventive care would be things like Lipitor and high-blood-pressure medication, I guess. Medical interventions designed to prevent the predictable onset of a health problem or to reduce its impact.
Early screening would be things like mammograms and PSA testing. They don't prevent or treat anything, but they increase the odds of spotting something while it is treatable. This can be a two-edged sword: a person may be diagnosed with cancer at a severe stage with small chance of recovery, but the health service team may press for agressive treatment that isn't truly in the patient's best interest. Or Demo-care may deny treatment that's truly in the patient's best interest.
The death rate runs, historically, one per person by age 120 and nearly one per person by age 100. There are reasons for stiff-arming the death angel and there are reasons for taking her arm and going quietly with her. Preventive care may change when the death angel comes and what guise she takes. Come she surely will.