you said "smarter" in this comment when a more accurate term is "corrupt". Being unable to find a candidate for your given budget requires that you either increase the budgeted salary or decrease the requirements, and train on the job. If you cannot do either of these, your company MUST fail. It is inhumane to demolish the US working class by importing foreign scab labor. Too much labor supply (aka immigration) decreases fair market value for wages. That alone is more than enough justification for ending all immigration of any significant amount.

Handwaving away significant issues as "bigotry, etc" is unhelpful to the discussion. We haven't even covered the impact on housing supply, as illustrated by Canada's insane valuations.

What are the knock on effects of lowering the total number of people/the velocity of money/the number of companies in America?

Canada's housing supply cost issues are driven by a wide variety of factors, very little having to do with immigration and far more with a small number of wealthy families owning a huge amount of land and a larger number of wealthy people holding many homes.

OpenAI and Anthropic and others are paying millions to hire qualified people, yet they still have to hire H1Bs.

Dont tell me there are no Americans willing to take a million dollar job and these foreigners are causing wage decreases, despite tech salaries showing only increasing trend. Theres never been a year when tech salaries have decreased, not in 2008, not in 2000, not in 2020.

Its all hockey stick growth for tech people.

Housing supply is blocked by American citizens, mostly boomers, who oppose any development and oppose public transit. You cant blame foreigners for something that your fellow citizens are doing

Re Canada: I believe there is strong money laundering money flow in Canadian RE that has nothing to do with immigration. Its all illicit money being laundered by Canadians themselves