Another fact is that the fastest growing segment of the population is the 85 and over group. The life for many of these patients is 4 - 6 hours a day of semi-lucid consciousness enabled by a cornucopia of expensive drugs and continual doctor visits. I don’t know what the answer is, but free (taxpayer funded) elderly care with no quality of life may not be supportable forever.
I have a 96 year old grandmother who still lives in her own house and does for herself. I guess it varies.
That, though is the danger in slapping some age to check out on the general population. Her great-great-great-granddaughter would never get to meet her...(and yes, she has one).