Help you in what regard?
If you are asking if you should include these experiences on your application, absolutely! Any work experience is important and having worked at two long term jobs shows commitment and maturity. I bet working with children and prisoners taught you leadership, good communication skills, and how to deescalate conflicts. Those are all skills you will need when working with patients, so highlight the fact that you have them.
If you are asking if those jobs will score you points towards service to the under-served - I'm not sure how paid positions will be viewed in that regard. But by all means, describe any insights or new perspectives you gained from working with people from different backgrounds, especially if those experiences motivated you to become a physician or to work with a specific population.