History of the U.S. Minimum Wage (Not a Living Wage?)

Minimum wage in the United States has been hotly debated. Research shows that no minimum wage job is sufficient to support a single working person in any state. But what was the original intent of the minimum wage? Was it truly just a “starting wage” for teens, or was it meant to be something more? And if so, what changes need to be made so that no person with a full time job is left behind?