I made minimum wage in the late 80's.  Needed 2 roommates and my parents often paid for gas and upkeep on my (paid off) car.  My expenses did not include a cell phone, pay TV, or an internet connection - thank goodness!  I skipped a lot of meals.  I stood in line for commodities and did not have health insurance.  I was not aware that minimum wage ever supported a person, but I think it might have been easier back then with cheaper rents.

That being said, I was unable to get a second job at the time because I worked retail with a varied schedule. I knew other people who struggled in the same way, although my employer was more willing to give set hours to people who went to college.  It would be nice if minimum wage jobs had set hours to help people who need another job.