Earlier quoted context omitted.
Smart people do better than dumb people at everything, ceteris paribus. If they didn’t then evolution would never have selected for intelligence.
I guess it depends on your definition of “doing better”, but for example in the Soviet Union the average factory worker made much more than an academic researcher, and I’d bet that academics would score better on an IQ test. So it’s definitely possible to build an economic system where lower-IQ individuals do better.
Given what I know about political infighting in the modern American academy though, I'd bet that the smart ones went to the politburo where they got to be the "who" and not the "whom" and it was the midwits at best who stuck around in the academy waiting to get shipped to the gulags for publishing something Stalin disliked.
In other words, realizing how the system actually works instead of naively believing how it's claimed to work is just another intelligence test.