I haven’t actually told you my immigration policy, and it’s clear you’ve incorrectly decided you know what it is.
My immigration policy would be to let in the set and sequence of immigrants that makes this country as nice a place to live as possible. Approximated with a greedy algorithm, that means picking the individual that makes this country the most nicer place, letting them in, and then repeating the calculation until we’ve run out of people that make the country a better place for us to live. Culturally, that means cultural optimization, not preservation.
I’d happily stop 99.999% of noncitizens from moving here and working here while allowing Californians to move to Idaho. (I’d also remove the financial penalties California places on people that moved from Idaho to California.)
That's not a coherent policy - that basically describes everyone's policy. That describes the current US policy. That describes my policy. It's just that you've shifted it to a discussion of what makes the country a "nice place to live," which obviously lots of people disagree on. In particular you haven't answered what to do when there are conflicting arguments over whether bringing in a particular person would make the country a nicer place to live or not, or for whom it's nicer.
Specifically, I think that this country would be a nicer place to live for myself if I can hire whomever I want for my team regardless of citizenship and without big government second-guessing my decision, and if they can feel confident about their long-term future once they move, therefore making them a) more likely to accept and b) happier and more productive when they're here.
I also think that the number of people who have moved into the SFBA (myself included, I'll be honest—feeling uncomfortable with that is part of why I left) have made it a worse place to live. I think there are ways to solve that other than internal migration restrictions, and I have other philosophical objections to internal migration restrictions, but I do see their appeal. You, for some reason that I don't totally follow, either don't think that SFBA has become a worse place to live or that this isn't an important criterion in deciding internal policy; I'm curious which it is (or whether I've misinterpreted).
That doesn't describe current US policy, which prevents people from coming that would make the country a nicer place to live, and lets many people in that wouldn't. By design, it even brings in random people.
I'm not describing a policy, I'm describing an ideal. (A simple concrete policy proposal is below.)
You said:
> Here's a simpler proposal: anyone from anywhere can come here and take any job.
So that doesn't describe your policy proposal either. Plenty of people can hold down a job and make the country a worse place for others, or a subset of others, simply by competing for resources, driving down wages in the sector they work in, by being a criminal, or by voting immorally.
I want to let everybody you'd let in, except for people whose immigration would make the country a worse place. Define that ideal as you will.
As a pretty good approximation, we could limit immigrants to those that could qualify for military service.
> myself included, I'll be honest—feeling uncomfortable with that is part of why I left
That's also a reason why I left. My policy as a national policy, is to make the country a nice place for all of its citizens (except criminals and slovenly degenerates) to live in. So that includes people that might like to move from Arizona to California. They're making their own lives better, which counts for something.
> I think that this country would be a nicer place to live for myself if I can hire whomever I want for my team regardless of citizenship and without big government second-guessing my decision
If you're like most employers, that means you're happier if you get to drive down working class wages, while you get to reap greater profits from your pre-established position in the market. That's good for you, but not good for the average American.
To make my goals a little more nuanced: Economically, I want only the smartest immigrants, which do advanced stuff like start companies, work for them, or work in healthcare, which drive up the demand for working-class labor, letting average Americans negotiate a better piece of the pie, while driving down the cost of their healthcare. Culturally, I want supply limited so that immigrants assimilate, and I want all the immigrants and their children to be crime-free pro-life Republican voters. :-)