How expensive do you really want your burger to be? Operational costs get passed on to the consumer after all. Raising the minimum wage just increases the rate of inflation leaving everyone holding the bag.
Also, jobs should pay what they are worth to the business and nothing more. Why should a high school student working for McDonald's be able to afford a 2 bedroom apartment in the Bay Area? That's not some sort of right.
Maybe we should be talking about realigning education to give people valuable skills instead of pushing for the non-skilled to get an artificial raise that evaporates in meaning due to inflation.
EDIT
I'm really surprised by the push back on this from a community of entrepreneurs. Anyone who has run a business will tell you that you can't just raise salaries without increasing costs. It's Econ 101 but apparently that's not the general sentiment here. I hear a lot of complaints about how things "should" be and what's "fair" but the math and reality isn't there to support that. Some jobs just don't have much economic value and pretending that's not the case isn't going to solve anything. It's nice to imagine a situation where janitors and fast food employees can have a middle class lifestyle but who is supposed to pay for that? When the costs of good raise dramatically, their additional pay will get sucked up by inflation. Again, Econ 101.