In my experience, most minimum wage jobs are awful; tedious, boring, and often with a lot of physical exertion. Add to that the fact that you're unlikely to be treated with much respect by your supervisor or the public (if applicable).

I'd wager that the number of people who are truly content doing this work as opposed to a higher-paying job is effectively zero. That is to say, a number of people so low that it is irrelevant.