On population explosion in poverty-stricken areas

I recently saw a TED on experiential vs. remembering happiness. This talk discusses the conflict between two types of happiness people typically want to achieve. One type is "in the moment" and the other comes from one's sense of accomplishment. The former is driven by "how much am I enjoying this minute", while the latter is driven by "what tangible social, material, and personal achievements have I accomplished thus far". The two types of happiness tend to be at odds with each other, since momentary pleasures must often be sacrificed for future accomplishments.

You can watch the talk itself here:
http://www.ted.com/talks/lang/eng/daniel_kahneman_the_riddle_of_experience_vs_memory.html

And, in more detail, here ("Evolving notions of well-being")
http://mbb.harvard.edu/resources/pastnews2008.php

In the context of these conflicting happiness-es, I think population explosion in poverty-stricken areas around the world makes a lot more sense. The experiential happiness of this population is already at rock bottom, with little chance of improvement. The only happiness that they can impact is the "remembering" happiness, and few things in life give one a greater sense of accomplishment than raising children (or so I hear). Possibly, the more children, the more "remembering" happiness. Presumably, poverty-stricken individuals are bridging their happiness gap the only way they can, by engaging the few outlets for achievement that they have available to them to compensate for the lack of experiential happiness with remembering happiness