What do you think happens at retirement?  Most people get bored and spend their savings away on cruise trips, eating out and drinking wine.  The reason we see a lot of people continuing to work past age 65 because they're afraid of having nothing else to do in their old age.  This is North American society where people only get to see their Grandchildren (if they have any) once a month or every several months (since they are 2000 miles away by plane), instead of everyday like in the European and Asian extended families.