The U.S has a national security interest in completely stopping all of it. They dont, because every administration is paid not to.

Regulate tech, ban labor export, ban labor import, protect your countries from the sellout.

It's not a secret companies do not want to hire Americans. Americans are expensive, demand too many benefits like fair pay, healthcare, and vacations. They also are (mostly) at-will. H1B solves all these problem. When that doesn't work, there's 400 Infosys-likes available to export that labor cheaply. We have seen this with several industries, the last most prominent one being auto manufacture.

All that matters is that the next quarters earnings are more than the last. No one hates the American worker more than Americans. Other countries have far better worker protections than us.

I see no reason H1B couldn't be solved by having an high barrier to entry (500k one time fee) and maintenance (100k per year). Then, force them to be paid at the highest bracket in their field. If H1Bs are what it's proponents say - necessary for rare talent not found else where - then this fee should be pennies on the value they provide. I also see no reason we can't tax exported labor in a similarly extreme manner. If the labor truly can't be found in America the high price of the labor on tax and fee terms should be dwarfed by their added value.

If it is not the case that high fees and taxes on H1B and exported labor make sense then the only conclusion is the vast majority of H1Bs and exported labor are not "rare talent" and thus aren't necessary. They can come through the normal immigration routes and integrate into the workforce as a naturalized American.

and, again, riddled with vulnerabilities.