I thought I did the opposite of ignore it, which was to address it directly. I acknowledged it was a difficult thing to deal with but that almost all countries will have to soon anyway, and I also also rejected the assertion that it is the "true" problem.

Japan has PPP per capita income more than twice as high as China, 5x India. The idea it can't possibly pay more to take care of its elderly and infirm otherwise its society will collapse is up there with the most ludicrous wall street craziness I've ever heard. And they've already been ousted as shysters, mind you, because they've been repeating the same thing for a generation now. Because what they are really scared of as I said is people waking up to the fact that their pyramid scheme isn't the only way to do things.

Seems to me that by the time we reach a global crunch, countries like Japan that will already be a generation or two into addressing this problem and restructuring their societies and economies to cope without ever increasing population will be in a far better position than those continuing to push unsustainable growth to defer the inevitable.