Uh, if everybody has to pay the same minimum wage, like they do now, then that means the playing field is level. If you think a business that has to play less than it takes to live, and thus have employees on food stamps, and housing vouchers, to survive, then that does not sound like a sustainable business model to me.
Think of Newtons third law, for every action there is an equal and opposite reaction, wages go up and prices go up, wages go up and taxes go up, with the end result being that those people with their shiny new living wages really aren't all that much better off with higher rent, food costs, gas, utilities, etc., etc., etc.
Oh yeah think of all those people that don't get that lovely wage increase but do get the price increases, people like pensioners and seniors on social security.
Level playing field my A...