Fast food workers are often adults with children, not teenagers.
"Now everyone know how poorly fast-food jobs pays. They also know why this is supposed to be okay: fast-food workers are teenagers, they don't have kids or college degrees, and it's an entry-level job...[this] was contradicted by what I saw in North Carolina. These, days, fast-food workers are often adults, they often do have children, and I met at least one college grad among the protesters in Raleigh." p.9
Thomas Frank, “Easy:Chair: Home of the Whopper,” Harper’s Magazine 327 no. 1962 (November 2013): 9.