I'm no economist
and maybe I did the math wrong but when I added inflation every year to the minimum wage starting in 2000 to 2013 I came up with $7.00. That's .25 less than it is now. That system might not work for every decade or decades but one could add stop controls or financial adjustments if inflation rose to abnormal highs and then adjust the rate when things get back to normal.
Great link btw.
It shows that during the Bush years is when the least amount of people where being paid the minimum wage.