First, maybe you should have bought more ammo while it was cheap and plentiful.
Second, how do you know these “morons” are pissing off ammo? Unless you are standing there watching them fire rounds into the dirt for no reason other than making a joyful noise, you don’t know that they are wasting ammo. If they are wasting it, well, this is still America. Let freedom ring.
Third, I fail to see how your first points are connected at all to the belief that newer cartridges will not last long in a firefight. Are you suggesting that there is not enough ammo in the supply chain to supplement a combat unit in a sustained, prolonged engagement? Perhaps you are correct, but that statement would apply to very danged few people on this message board. Most consumers can source enough ammo of any sort to satisfy their needs if they look around. The ammo shortages that come and go only affect those whom can not or do not prepare for their inevitability.