I suspect the answer is, like most things, 'politics'. So, to me, for instance, take the biggest problem the world currently faces - global heating. I think e

I suspect the answer is, like most things, 'politics'. So, to me, for instance, take the biggest problem the world currently faces - global heating. I think everyone knows the two or three things we would need to do to 'solve it': - carbon tax - carbon capture - energy reset/clean/green/conservation/etc. But it's only partially 'solved', same as robocalls. There are just too many people making too much money, having too much success, with robocalling to stop it.