Fish wheels accomplished the same thing, but they were outlawed by the people in 1934. https://ballotpedia.org/Washington_Fish_Traps_and_Fishing_Regulations,_Initiative_77_(1934)
The sport fishermen were among the strongest supporters of Initiative 77:
http://www.independent.org/publications/article.asp?id=2453 (see especially Section VI: The Political Economy of Initiative No. 77).
Traps (a fish wheel is a type of trap, so is this pound net thingy) were outlawed because they were efficient in catching fish, i.e. more fish caught per person working the gear. The less efficient gear groups (and this at the time included both gillnetters and sport fishermen, yes, gillnetters were your former allies, folks) did not like this, especially during the Depression when people needed work or at least something to do. However, what people failed to recognize is that traps are also efficient in terms of regulation, i.e. the number of fish and which types of fish can be retained can be easily controlled, and unwanted harvest can be safely returned. It is so sad that WFC and so many others fail to acknowledge that there was very good management historically until it was messed up by politics, such as Initiative 77.