There's a massive spike in mortality for those who retire from work versus those who keep working. In fact, working just a single year after you're 65 is associated with 11% lower risk of death for healthy people and 9% for unhealthy.
Working is objectively good for your health. Stopping work is associated with an extremely large increase in mortality risk, for both healthy and unhealthy people.
Any alternatives must weigh the resulting death it will cause.