Yes, but evolution is much slower than cultural change. In principle, it is possible that a society might have very high and very uniform standards for the minimum wealth per child, so that it would take a very long time before evolution undermined these standards noticeably. In the meantime, it would make sense to speak of a Malthusian equilibrium.
In reality, of course, such a situation is highly improbable and (to my knowledge) not attested historically. So it's not really a mistake to equate a Malthusian equilibrium with awful poverty and constant threat of famine. (The latter would of course also have its analogues in a Malthusian upload society, which are not hard to imagine.)
I wasn't referring simply to biological evolution.
I was browsing my RSS feed, as one does, and came across a New York Times article, "A Village With the Numbers, Not the Image, of the Poorest Place", about the Satmar Hasidic Jews of Kiryas Joel (NY).
Their interest lies in their extraordinarily high birthrate & population growth, and their poverty - which are connected. From the article:
From Wikipedia:
Robin Hanson has argued that uploaded/emulated minds will establish a new Malthusian/Darwinian equilibrium in "IF UPLOADS COME FIRST: The crack of a future dawn" - an equilibrium in comparison to which our own economy will look like a delusive dreamtime of impossibly unfit and libertine behavior. The demographic transition will not last forever. But despite our own distaste for countless lives living at near-subsistence rather than our own extreme per-capita wealth (see the Repugnant Conclusion), those many lives will be happy ones (even amidst disaster).
So. Are the inhabitants of Kiryas Joel unhappy?