That's a good point. If it is a workable idea it could only be applied on certain species, in certain watersheds, and (hopefully) only as a temporary measure on streams where management itself can't immediately increase escapement to adequate levels.
My biggest problem with the idea in areas where it may help is that it kind of sounds like an excuse to continue harvest business as usual. Amato's biases are obvious, considering his ragazine (which I am admitedly addicted to).