I see people on here attributing this to 'free market'. To them, I say no. This strike has nothing to do with free market. To eliminate government regulation, a free market replaces such control with consumer responsibility.
A much better story would be 'Thousands boycott McDonalds, Demand #15/hour pay for employees.' Unskilled labor (ie. burger flipping) is easily replaced, but consumers can't be forced to buy the product [unless it's healthcare ^_^]