Anecdote? Look up employment stats in any relatively old country, you’ll find that a significant portion of 65 year olds are still in the workforce. Calling them dependents is ridiculous. And in Asian American immigrant circles, 60+ yr old grandparents taking care of young children is basically the norm.

Does the data support the "general rule" then? I think 65 year olds today are much more able than 65 year olds 50 years ago.