Despite whatever the law is, I doubt that many people in this country are actually paid the minimum.
Hell, there are people who do no work at all who make more than $5.15 x 40 per week. I'm sure there are a precious few exceptions, but IMHO if one isn't smart enough to find a job worth more than $5.15 x hour, one probably isn't smart enough to generate much more than $2.50 x hour.
Min. Wage laws really undermine federalism as far as state variations in cost of living, local tax rates and requirements, etc.