SO:  There are about 4000 non-resident slopers.  Don't know the number in fisheries but you can go to the Department of Labor and Workforce DEvelopment website to get the exact number.  I think the total number, all industries, of non-resident workers in Alaska was about 70,000 most of whom are seasonal and don't earn enough to pay an income tax.  An income tax will fall on the backs of the 200,000 Alaskan wage earners who earn enough to pay an income tax.  You don't want to cut off your nose to spite your face.