A more intelligent human can out hunt, out trade, out farm, out fight and out plan a less intelligent human of otherwise equal ability.
Intelligence has always been correlated with wealth, for as long as there has been wealth. Every human invention and innovation has as its author - a highly successful and intelligent individual. The inventor of the spear thrower - as just one example - no doubt had great reproductive success.
There have been at least 100,000 years worth of human generations of fully modern humans - plenty of time for a gene for greater intelligence that had no associated drawback to be favored.
My point is that almost everything has a drawback - there is no such thing as a free lunch.
As far as socialism encouraging layabouts to reproduce - thankfully that is a very recent ‘innovation’ and a symptom of how little scarcity of resources is a problem in the modern industrialized world.
Absolutely, no argument there.
My argument is simply that hyper-intelligence (as opposed to moderate-intelligence) hasn't really given humans a reproductive edge. Sure, the inventor of the spear, or wheel, or whatever was a lot smarter than his rivals, but using those inventions didn't require hyper-intelligence. The use of these inventions granted great reproduction advantage, but the invention of these things did not.