So I thought about your comment a bit, and I will throw this out and see what you think. The only hooks I have had to throw out are some original light wire slider heads and maybe some cheaper Ned heads, fireball jigs, or standard ball heads. Regular bass jigs or pro slider heads I have never had rust. I mostly use Santone, so could be they use a good hook.
Here is the part to think about. My most popular bait, menace, at regular price is roughly 66 cents a bait. Say I save ten of those by not taking them off because the fish don't want them that day I save over 6 bucks. Since I have changed to the pro sliders I only toss one or two hooks/jigs away a season because I am either using jigheads or old sliders I have left. I have started to unrig some baits depending on the head at the end of the season and rerig them the next year so they don't rust over the winter. The only reason I switched from the light wire sliders is because I straightened one out on a huge bedding bass, not rust.
If you truly are pitching the plastics that are still usable, the cost on those adds up as well, likely more than a jig or two. I am not saying either way is right or wrong, I think both methods can work. I think the key for me is the open box which allows them to dry. There are also holes drilled in the bottom that you can't see so that water drains out and doesn't sit in the bin. Without the holes I would have a big mess. I never box up a rigged wet bait in a plano box.