This thread has gone for six pages and over 100 posts. So don't hand me that. Especially when your "solution" is...
Putting aside the insane number of technological advancements which will be required to realize this, it simply isn't practical considering the deadline with which we are eyeball-to-eyeball.
Plus, there is the very real chance that the level of technological change your solution requires will require draining resources nationwide and perhaps worldwide, further impacting overpopulated areas. And even if all those things are possible and if we can somehow do them within the next three decades, there's still no guarantee of success.
On top of all that, the best I can say about your idea is that it takes our problems out into the cosmos rather than solving them here. That's not a solution. It's simply kicking the can down the road so that when we go beyond the point of sustainability, we might have several extra-planetary colonies that will die with us.
So no, I reject your solution on the grounds that it isn't a solution at all.