Are there any available estimates of Alaska earned income that leaves the state annually via fisheries, oil patch, tour industry?  It is my impression this income is substantial, benefits significantly from all the State provides and I really wonder how much they contribute to the state economy compared to residents? This is what causes me to support an income tax.  Also I believe it would be more costly and difficult to impose and collect a sales tax. Not to mention the general regressive nature of sales taxes.