There are only two solutions to the problem.
1.) Gun owners simply shoot their guns less and buy less ammo. I think we've pretty much proven that we are, with few exceptions, not willing to do that.
2.) Ammo manufacturers increase production to meet demand. I think they've prove that they are not willing to do that.
Here are other solutions to the problem.
1. Shooters keep a good stock of ammunition on hand all the time, bought in bulk when prices are low so they won't have to scramble around and buy it during a shortage when it's hard to find and prices are high.
2. Since most shortages in recent times are demand-based shortages, specifically panics, shooters refrain from passing along rumors that might start panics and refrain from engaging in behavior that increases their duration and severity. That is, they don't engage in panic-buying large quantities of ammunition that they could have bought more easily and more cheaply and already had on hand.
There is no need to shoot less and buy less ammo, in fact one will spend less on ammo using my approach--or could buy more amount of ammo for the same amount of money, whichever is most attractive to them.
Ammo manufacturers have only so much "wiggle room" to increase demand. They can add more shifts, but that's about it. If they build more facilities at high expense to meet demand that turns out to be a panic-based temporary shortage then when the panic ends, as they inevitably do, they are left trying to pay off huge facilities loans with no way to raise the capital. Because so many ammo buyers prefer to buy only when there's a panic. So, Yes. In one sense ammo makers are only willing to do so much to meet temporary demand surges because if they over-react, it could ruin them while under-reacting actually increases their short-term revenues while preserving their long-term well-being.
That's why I recommend buying when there is not a shortage and why I recommend doing whatever possible to prevent and to shorten the duration and limit the severity of shortages buy not engaging in panic-based buying. It's good for those who take the advice and it's good for the ammo companies because it levels out demand and helps them to plan better.