I think the State realized, when they looked at the possibility of Boldt II (habitat, see culvert case) that the Tribes had the whole state by the balls. Stop development, roll back damage, and so on. The State (and business) was scared shitless about having a court say that the Tribes had a right to at least a moderate living made by fishing for salmon. That has led to the current situation. Give 'em what they want for as long as we can. Eventually, development and climate change will render strong salmonid populations moot.