I find the concept of retirement optional - as I do the need to continue SS the way it is. Make it optional as well. So if I do better at personal investment, I may take option to "retire" and say do something I'd want to do. That may be still working - but working at something I want to do, not necessarily something I have to do for the pay. One can argue that anyone can do that now - but life's circumstances may not make that a wise choice. Make it optional - extend retirement age (for benefits) to 70.
One must also realize that, generally we are living longer - that does NOT mean that extended life means we are able to work. Quality of life issues and capabilities at 60 or 65 may inhibit some people from working.
“I think if Thomas Jefferson were looking down, the author of the Bill of Rights, on what’s being proposed here, he’d agree with it. He would agree that the First Amendment cannot be absolute.” - Chuck Schumer (D). Yet, Madison and Mason wrote the Bill of Rights, according to Sheila Jackson Lee, 400 years ago. Yup, it's a fact.