[lacker]

When the position is "best people you can find", how can you argue a US citizen does not fulfill the requirements?

Because the 100 best people you can find aren't all US citizens, when their citizenship isn't relevant to the job. This law (and common sense) permits companies to hire for a highly paid job and to make the requirements so demanding that you have to look outside the US to hire enough people. That's exactly what is happening at the large "good" tech companies like Facebook or Google, and the same is true down to the mid size "good" tech companies like Airbnb or Stripe.

The real abusers of the immigration system are companies that are not bringing the best and brightest to the US, they are just trying to recruit immigrants so that they can offer lower wages.