Here in Pennsylvania, the state just passed a minimum wage increase bill because the federal minimum wage had become meaningless. Few businesses were actually paying wages that low. For one reason, state and local taxes are so damn high, businesses have to pay more and charge more just so their employees can break even. One of my daughters who is working in Idaho has about a 20% higher take-home than her sister who is working locally even though their hourly wage before taxes is almost identical.
This is why we were established as a Federal Republic, not a top-down managed People's Democracy-- so that states could deal with things as they best fit them.
I'm not familiar with America Samoa, but it is entirely possible that the cost of living is a lot less there and a one-size-fits-all federal minimum wage may not be appropriate.
Samoa is basically a loophole; it allows 3rd-world slaveholders to put “Proudly Made in the USA!” on the label, while paying a few dimes an hour.
The minimum wage law WILL cause unemployment to soar in Samoa, but, unlike most inner-city effects of minimum wages, it will nonetheless result in far more people being able to survive.