If the population stabalizes, or even starts shrinking, how important is growth of productivity? Making "Stuff" is obviously important, but in a world with lowering demand, maybe quality and distribution are the metrics we should be concentrating on.
I have 2 kids, I am the only one with kids in both mine and my wifes family. My 2 kids are the only grandkids between 3 sets of grandparents (wife's parents got divorced and remarried). They are inudated with LOADS of stuff. So much so that it's a real problem. I tell my parents to stop buying them stuff. They think i'm joking. I'm not. IT'S TOO MUCH STUFF. I wish they would all go in, and just get my kids 1 good high quality thing. They just don't need all this cheap low quality stuff.
I bring this up, because thinking this way is a different paradigm. Agile is still very relavent to quality driven development. But scale less so.