Here's a novel idea, if fast food workers want to earn more money, don't be a high school drop out, get an education, if you have a college degree have one that is worth a damn, a Liberal Arts degree is a junk degree and hardly any one will hire you with it, learn to communicate like an educated person, and most important; stop expecting maximum pay for minimum work. Learn to apply yourself and stop trying to do the least and screaming for more, the hard you work and apply yourself the more you succeed. If you have a HS degree, get some college under your belt, learn a trade (flipping burgers and filling the ice machine is not a trade), working in fast food is not a career, it's a start job for teens, it's a temporary job for college students, it's a part time job for retirees, it's not design to be a career with a living wage (whatever a living wage is) so stop thinking your some skilled worker who deserves $75k a year.
I'm going to laugh my ass off if they get their $15 an hour and then all of a sudden they get laid off because their job just got replaced by a machine or the company downsizes in order to reduce the cost of labor. Keep asking for more and the only thing you will get is more time in the unemployment line.