The worst thing is a scooter. If you stop walking your health deteriorates, you gain weight and blood pressure will most likely increase.
SO a regular workout regime would need to be instituted.
Giving scooters to everyone is not a healthy idea. The short term quality of life may increase but the long term survival will probably decrease
Get a knee replacement or check out the stem cell therapies near you.
Google Stem Cell THERAPY Florida.
If you are over 80 then do as you wish