Its not that simple and frankly that borders on victim blaming. Lets take EMT's for example. They currently make around $15/hr, give or take a few dollars. Someone who's job is saving lives and requires training and certifications to maintain. If minimum wage was raised to $15/hr it now makes their job a minimum wage job. Currently its a halfway okish wage to live on but certainly not lavishly. Now with your mentality here, they would have to ask their respective bosses to raise their wage or quit and flip burgers. In this case if their respective management refuses to raise the wage they're just SOL. EMS can't strike (unless they work for a private company, but a strike would be ineffective against one) legally.

Again, I'm not against raising the minimum wage. All I'm saying is the discussion is a lot more complex than a headline can summarize. Telling people in that wage range to just ask for a raise or tough cookies is as insulting as telling a current minimum wage worker to just go get a better job if you don't like getting paid minimum wage.