What about looking at this thing from an entirely different perspective. As has been pointed out, if the wage for fast food workers is raised, the products will cost more. I fail to see how that, in any way, is a bad thing. If people really can't live without fast food then they'll find a way to pony up the cash, IOW, get a better job, and that's good for the country. Or they'll stop eating the shit and lose weight. How is any of that bad?
Did you stop to think that raising the minimum wage for fast food workers may actually be part of a solution to America's obesity problem? Seems to me it's right up there with how raising the tobacco price has reduced smoking, I don't see anyone bitching about that.