They are very much not in the low-to-medium end sysadmin/"IT person" consulting business.
The mere fact that you don't already understand this honestly kind of makes me wonder what you are doing here.
Unless, of course you are really against importing very competent people that will have high salaries, pay a lot of tax and be great benefit to the US, just for the selfish reason that it doesn't drive up your own salary... even more?
Let's just say there are quite a few smaller wannabe "Silicon Valleys" outside of the US that are picking up steam. If your government will continue to behave this erratically they will be quite happy.
The abuses and pitfalls of these visas are open for you to examine and you should be aware of them if you're in the industry...there have been numerous studies on wage suppression, graduate unemployment, numerous court cases, instances of mass-firings, large displacement, etc.
I'm not a US citizen and don't live in the US so my salary is irrelevant.
America's economy benefits from bringing some of the best brains in the world here. If America screws that up, other countries will be happy to accept smart workers and students.
I, for one, would(or would have before Trump) gladly worked even for 66000 $/year in the US, considering I'm currently making 1/5th of that in my home country. And it would be advantageous for me and would not see myself as a slave - people go there using H1B because it makes sense financially. And there you go, saying you're against H1B because you want to protect those people from what they want to do? The argument doesn't make sense! Just say already you want to protect your wages and don't hide behind "good will".
Of course it's rational for people to go to the US on H1b visas. I would be of the exact same opinion as you in this sense.
This isn't the issue though. One of the issue is the abuses that are occurring due to companies ability to hire many H1B workers at the expense of their own. Another issue is that large corporations are practically dictating government policy on visas. None of these are right imo.
And these are not the issues I'm attacking. I'm arguing against the self-richeous statements of some people that are against H1B visas because of the poor poor immigrants that come here[there] to earn such low salaries. They care about their own salaries, and that's fine, but just say so. In my post, I didn't take an issue with protectionism (although I don't agree with it either, even if I were either side of the border) but name that as your reason, don't hide behind a false one.
No, it doesn't mean that.
The bucket companies like Google, Facebook, Apple, Amazon or Microsoft are trying to hire from is the highest skillset. The supply is so short that starting salaries out of college are 6 figures; the situation is gentrifying the whole Bay Area. There's no way random shady company X can abuse any of these candidates, nor treat them like slaves, rather the opposite.
The other end of the H1B spectrum, these companies aren't interested in hiring. Their shareholders wouldn't want to spend a dime lobbying to extend those buckets.
I know all this from my own experience going through the process.