Mmm. I'd agree it would not be desirable, but why do you think it will be an option? Not being a smartass here, I'd just would like to be more optimistic than my current knowledge permits. We have ~ 75million net global population increase every year, every one of whom wants to have the std of living of a upper median income US life style ( at least ). Sorry, but I don't see any reason to think that our current life style together with the current and future population is sustainable. Something has to give.
The big problem in the not too distant future is not too many people but too few. Europe, Russia and Japan are imploding demgraphically. China is about to reach zpg and start dropping. India will probably follow. The trick is as you get rich, your birth rate falls. the trick is not try and limit growth, the trick is to get people rich FAST enough. Tossing the US GDP down the toilet is not the way to do that.