SnakeDoctor
Super Freak
Have you ever worked in one? Skill is just being able to do something well. Multi-tasking is a skill and you better know how to do that in a fast food restaurant.
I don't look down at these kinds of jobs because I know people who need these jobs to live. Too many hard hit places in the country.
Skilled labor is labor that requires special training, or experience, or education, or certification, or licensing, or something. Something any high school student is qualified to do is, by definition, unskilled. Fast food may take the ability to speak English, or take a drink order, or show up on time, or push buttons on the register, or cook fries and burgers at the same time ... but those aren't 'skills' in that sense of the term.
I worked in fast food in high school (long time ago). It is certainly labor ... but it isn't skilled labor. Its work. Its occasionally hard work. It takes time, and attention, and attendance. But, it takes no skills other than those of a normally functioning human being.
That's why its low paid. Not because its not work (that's what makes it a job). But because literally anybody can do it. That makes employees very replaceable, and thus of lower economic value. If a highschooler can do your job, you're not going to make much money (otherwise, they'd just hire the highschooler for cheaper).
SnakeDoc