There was a Supreme Court case that banned using testing as a condition of employment. Because racism.
Murray talked about it at length
And...Yes,...Charles Murray did talk about the tests industry was using, but they weren't using the SAT or ACT exams. They were using their own tests or recognized IQ tests.
Please read post #92.
I posted Murray’s Wall Street Journay essay.
Yep, Duke Power, I believe. Not being able to test for intelligence forced employers to use college degrees as proxies for intelligence, which required people to get college degrees for jobs that didn’t require college degrees—just intelligence.