I worked miimi wage 3 times, got fired from then because in one intense the place folded because of the minimum wage hike, two other times they cut hours and I was the one let go. This was during the carter administration when there were several minimum wage hikes. and I was a lousy employee back then
Imagine paying someone $15/hr just to say "Do you want cheese on that?" And they don't even have to figure out how to make correct change cuz the register does it for them.
I get $18 an hour and its a lot more than just asking a few questions, believe me.