Depression vs. Boredom as well! Maybe they aren't sure what to do with their life. I was reading an interesting publication on the various "cycles" of aging and there was a reference to the transition time after retirement, in particular for someone who has been a "busy" person their whole life. After working for many years, raising a family, etc. one is left to wonder "now what do I do?" I encourage able-bodied seniors to check out the various volunteer programs. I have seen great things come from this organization: http://www.seniorcorps.org/ . I have seen crossing guards evolve, readers in a local or school library, a volunteer clerk, etc. They are able to connect you with your local agency who can better explain what opportunities might be available.