One of the problems is that geography and demographic movement trends within that geography is a very real thing.

Let’s say a rural town has lost population in the last 20 years, and most of the population that left is educated.

Now they need a teacher, which requires a bachelors or even masters degree.

The rural town’s unemployment rate is 10% but there are no qualified teachers who are unemployed.

So now we want to move someone in from a nearby urban center that has a big market of educated people. But the unemployment rate in that big urban area is 3%, and the area is wealthier with a higher salary rate for jobs across the income spectrum.

Let’s say my local teacher salary is $50,000, the big city teacher salary is $90,000, and the big city high school diploma career salary is $50,000.

I have to find someone who is a qualified teacher who isn’t already a teacher and isn’t already working someone where else that’s still paying better than my local area. Plus, that person has family, friends, and prefers the big city with all its amenities and infrastructure. I can tell you right now that you would have to pay me far above market rate to get me to move because I’m already employed and happy.

In contrast, someone in a foreign country is potentially getting a huge upgrade to move to the US or another developed wealthy country and is way more motivated to make that leap.

I imagine these programs exist because the cost benefit just makes sense. Not only do you solve the imbalance faster, easier, cheaper, but now the wider country has gained educated population which is generally an economic benefit.

Certainly there are flaws in the system that need to be fixed. I don’t mean to advocate for it necessarily, just explain why I think it exists.

I would also point out that it’s not necessarily the case that the local labor market is being undercut (see the geographic example I gave above), it’s being expanded, and that includes adding someone who is paying taxes, buying stuff from local businesses, etc, which they do even before they become citizens.

Yeah I agree with all that but notice that the comment I responded to was either about an analyst in the bay area or a stream of pavement design jobs in unspecified locations. I wouldn't necessarily object to the metric of "do qualified americans exist" being limited to a certain geographic area as long as the resulting criteria was sufficiently difficult to abuse.