It is insane to mandate such things, the market will take care of it. For example, here in California, McDonald's is offering NEW HIRES $10/hr for full time employees after their 90 day training period. They also get benefits. Raising the minimum will only increase the cost of part time employees.
However, what most people fail to realize it that a good majority of big time union wages are based on the minimum wage. Thus, a raise in the minimum wage also increases union salaries for trained/skilled workers. This is why the unions, and therefore the politicians they finance, are on board with all of the nonsense.
It's not just going to increase the cost of your burger. It will increase the cost of your car, your groceries, new construction, and health care, just to name a few.
It will also increase your taxes to pay for the people who are put out of work.