The thing that you're all conveniently ignoring is that many jobs aren't worth 7.25 an hour. Instead of getting a pay increase, the people working those jobs just get laid off. Now, a minimum wage set at the wage equilibrium would be perfect in that it would ensure that employees are paid what they are worth while not creating deadweight loss. However, this is not possible due to the fact that the equilibrium wage for each job will be different based upon the profit that job produces. So throwing out a hazard guess that's clearly far above the ideal wage for most manual labor only causes people to lose their jobs.
Here it is in visual form, if that helps.
---------- Post added 2012-06-11 at 12:01 AM ----------
It varies from state to state. It's 7.25 in Indiana.