I started my working career in fast food at 15 years of age. Made 3.75 an hour slinging tacos at the local Taco Bell. It was phyically demanding, greasy, nasty work with impacted my health and complexion. Worked there for two years, promoted to management after 9 months. I learned life lessons and business skills that still serve me to this day. How to deal with problem co workers, how to prepare profit and loss ledgers, how to balance a business budget. No one at my store used the job as the primary/sole income to support a family. Most of the employees were highschool and college students who worked for extra cash. The few that had families had second and third jobs.
Minimum wage is almost $8 an hour. If someone were to take two jobs at that rate they would be pretty comfortably middle class. The minimum wage is not enough to support a family with 40 hours of work. It is not designed to be. Raising the rate to $15 an hour would harm the people its intended to help. Those with low/no job skills would not be given the chance to learn basic work practices. If I were the owner of a store and had to pay $15 an hour, any cook I hired would have years of experience. Any front of house staff would be skinny, young, flirtatious and female. The inexperienced and/or unattractive would suffer.