Of all the various revenue proposals out there, this is the one that would cost the least to collect.  Since it is a percentage of the Federal tax, most of the work of determining how much is needed is actually done by the IRS, and so relatively little work is needed by Alaska.

Interestingly, this proposal is also the one that will get the State the most money for the least amount of taxes paid by Alaskan residents.  Since state tax is tax deductible on federal forms, without needing to keep and store receipts (as you would for a sales tax), a substantial minority of the amount collected would be off-set by taxes Alaskans were not paying to Uncle Sam.