I believe that the age at which we retire is not the age that determines how much we should work, but rather the time when we want to rest.
The workforce of retired people in their areas of work is getting bigger every day, since the market has expanded due to technical advances and also due to the fact that those who are used to being active will not be able to stop being active.
Certainly it is always good to set long term goals but as a popular adage says, every age has its advantages.