I think there are these different kinds of tech workers. For lack of a better term lets call them IT staff and software engineers.
IT staff builds some new systems but mostly puts pieces together to solve problems. This kind of job is easier to replace with moderately skilled foreign tech workers, maybe even working remotely, there's more supply here for this kind of worker. Then there is the harder to find software engineers who can work on new software from scratch, perhaps with more experience in this kind of worker. There's an incredible demand for this kind of person, that's unquenchable at least today (perhaps it used to be infinite for it staff but no longer). We really do need more of the second category of workers. Certainly a little smaller supply of workers means higher salaries, but when you need double the supply, you can restrain growth of the industry.
Are we being paid low? No.
Are we being paid lower than what we should be paid? I could see that argument being made.
Is it possible that we may get paid higher? Maybe
Do we deserve to get paid much higher than those equally talented people working elsewhere in the world? Or those who are super smart and hard working but not making much money just because they don’t work in tech? I don’t think so
They either
1. Left tech due to low salaries from immgration. I don't think this is true because tech still pays higher than almost any other field.
2. Working in tech for low(er) salary, which contradicts the orignal claim that only reason for importing tech workers is for lowering salaries.