Then it is a wrong societal norm. My grandmother retired at about 95 years old and she lived with us (daughter's house and 2 grandchilds) until she died at 106.

Then it is a wrong societal norm. My grandmother retired at about 95 years old and she lived with us (daughter's house and 2 grandchilds) until she died at 106. She had a tiny government pension (about $100 per month) that she had not to spend on anything because the family cared for all her needs. When you live with someone and the marginal cost is just one room and one seat at the table then this is not a burden for anyone. If you want your separate house and someone to help, that is not sustainable unless you saved big time.