Well, with my recovery from some flavor of autism, I have a very sensitive nature to sound and vibration, and children's voices pretty much are the pinnacle of things that can make me go into a rage. CRT squeals, mechanical tapping and certain birds coming in at a close second. Beyond that, I have no idea how to talk to kids, so I usually talk to them like adults until they either go away or, more rarely, actually try and keep up...weirdly, kids think I'm super cool, and it's hard because I don't want to be rude to them. I'm terrified of babies and toddlers. Little known fact--been beat up by asshole cowboys all my life, don't wince a bit at them. You put a foot-and-a-half toddler in my path and I panic. Pretty stupid, huh? :|
Kids aren't at fault, nine times out of ten it's the parents, but there's a lot being contributed by bad schools, stupid laws and society's general acceptance of all of the above.
Thinking about it more, I truly think if there no births for a year from anyone, nothing would change one iota. The only industries affected would be baby-related, from hospital wards to stores, and I doubt that in itself would collapse an economy nor give the boost needed to show any benefit. Food stores would simply be that--stored, until it is needed, wasted or fed to animals.
Not having kids for 10 - 20 years? Then you'd see a difference.