I think it's a fair assumption to make that we cannot increase healthspan significantly more than we can increase lifespan. The increases to each would be simil

I think it's a fair assumption to make that we cannot increase healthspan significantly more than we can increase lifespan. The increases to each would be similar; after all, a healthy body won't just keel over and die. The post you were responding to specifically mentioned the costs of end of life care. If we can't reduce the amount of time between when a body begins to fail and when a person dies, then we've done nothing to address that issue.