IQ scores are highly correlated with actual success, undeniably so.

Maybe IQ doesn't exactly track "intelligence", or whatever that is, but it is certainly tracking something that is correlated to success.

Sure, but is that causal? For example, maybe there's some other factor (like SES) that's driving both. And switching to IQ tests doesn't really solve the problem, as your avenues for cheating on that are identical to LC.

You could probably screen candidates based on the question "Did any of your parents go to college? And if so, did they study or work in a STEM field?" and be roughly as predictable.

(This is terrible and you shouldn't do this)

We know for a fact that it is IQ that is driving SES and not the other way around.

What evidence do you have for this claim? You are suggesting SES is a meritocracy around IQ.

identical twins reared together vs apart, their IQs correlate more with their twin's than with the SES of the adoptive family.

high quality studies have found that the additive heritability of IQ is somewhere around 0.8-0.9, that's just totally incompatible with parental SES as the primary upstream cause. it's simply not debatable (and it wasn't debatable ten years ago either; this is hardly new knowledge)

Yeah but hiring companies don’t care. Same as these interviews that they do have some correlation to success maybe no better than iq

IQ is imperfect and has many issues that haven't been accounted for, nor should it be extended to represent all of intelligence, and many tests claiming to test IQ are completely pseudoscience, if even that, but the general concept isn't pseudoscience. A standardized IQ test has correlation with a number of other indicators of intelligence. It isn't a prefect test and popular culture has greatly oversold its importance, but our society misusing the science, and even scientists historically misusing the science, isn't reason enough to call it pseudoscience.