Not to get in the middle of whatever this is but I do have a unique insight into hatcheries. For the most part, the hatchery system itself is horrible. However, if done correctly, hatcheries can be a huge benefit to a system. I have seen pretty much no gov't hatcheries that are run correctly though.
For history, my dad ran a private hatchery in Washington for a number of years raising coho. There were many differences between what we did and what the state run hatcheries did. First and foremost, it was a labor of love and not a job. My two brothers and I and my dad would go out three or four times a day, cleaning the eggs out. If there was one moldy egg, it got removed. If you look at the state hatcheries, they just let that one egg die but then the mold spreads to all the other eggs around and you lose a bunch of eggs.
Second, we raised them in boxes until the egg sacks were gone. We did not however then transfer them to concrete pools after this. We transferred them to numerous ponds that drained into the creek system. We would still feed them for a couple weeks after transferring, a little less each day but before too long, they were finding their own food, used to predators, and growing.
When they migrated out of the creeks and started their trip downstream, they were probably 3 times the size of the same fish raised at the state hatchery. When they came back, they were as big and strong as wild salmon. 10-12 pounds easily. And there were a bunch that made it back to the entrance to the creek.
Sadly, there was a net placed across the mouth of the creek and so we only got to see the fruit of our labor getting caught in the net and no spawners made it back that we found although we were told some people saw some spawning at some point.
If hatcheries acted as just a place to hatch eggs and then released them into the wild, I think the result would be much different. You get fish that are prepared for predators and eating, not being fed. Also, if it gives any indication, the state run hatchery our last year raised roughly 1.5 million at quite a cost. We raised 750K at no cost to the state other than the cost of the eggs and a bag of food. Yes, we paid a cost in time, equipment (egg boxes, totes, airators, etc) but it was nowhere near the cost the hatchery had.