Retail is not bad. Sears will give just about anyone a chance if they have the patience to navigate the online hiring process. Many of our best salespeople were older than 55. Standing that long can be difficult for some, but all the heavy work is done by the receiving staff. Although it's not the greatest job, it will help someone get their foot in the employment door. 

It's interesting that you think it demeaning somehow to dig ditches or clean toilets. I'd do either of these tasks without complaint. I may, however, find it hard to work for you.