Of course, it's not Mayor Adam's fault that ten thousand migrants come to his state every month from republican border states, and no it's not the republican's fault either. If I was a Republican in Texas I would be livid if I was forced to care and pay current taxes for migrants when states with more people agree with high or higher levels of immigration relative to Republicans.
When migrants migrate to a country they can't just willy-nilly pay taxes, get a job, etc instantly. They need to be housed, and their children need to go to school first then they need to see their asylum cases handled. I used to believe in an open borders policy where anyone who can get in should get in, but that's not realistic. Most migrants aren't going to my state of Ohio where we in Columbus have plenty of room, but nothing to do and taco trucks would help us create a better food culture in Columbus(Unless you live in Delaware County). They are going to the popular cities of LA, New York City, and Chicago or any other top 10 more popular metro. Space there is likely limited, and building high like what I want has its costs. It's maintenance costs that will make tall buildings cost an arm and a leg. There's a reason in the US we build lower-story buildings. I don't like it and wish for there to be engineering solutions to high-rise buildings and their maintenance costs, but right now there aren't any to make that better.
Density means inspectors, fire suppression, garbage pickup, and even simple things like plumbing can get very complicated. It's great for leftists to want higher buildings, but sucks from a cost perspective and maintenance perspective. My personal favorite is the single-digit-story apartment buildings we have in many cities. Low cost, decent density, and great for the environment, but a metro of high rises is out of the question.
If we treat migrants like an investment problem it's going to take a while before they become societal contributors which even decently well-functioning adults like me(Somewhat) have trouble with. Migrants are a future good/service investment. Yes, some will be skilled in their profession, but many don't speak English unless they are university grads or Indians for colonial reasons. Yes most work, but the more valuable component is the first-gen kids, and their kids, and their kids. They will be the ones who get assimilated and become the dynamic contributors we need.
So why doesn't the US government just force migrants to go to a certain city, or state or even pay them? Well, one because they don't want to, and two freedom/human rights. Also that costs money too.
So why don't we just allow them to get jobs, and start paying taxes ASAP? Well, that leads to the problem of induced demand. The US is one of the wealthiest societies on the face of the planet for its size. The more you let in, the more will come. The more open the border and or immigration policy is the more will come. There is likely a medium/optimal percentage rate of immigration where you can assimilate immigrants, get them jobs, get their kids to schools, and NOT create favelas, and homeless encampments and the US government at least wants you to speak English and Spanish for practical purposes(Unless you're a republican then English only). Some immigrants from Central America can't even speak Spanish(I shit you not). This creates more problems that can only be solved in the future as these kids then learn English and a few become indigenous language translators
This problem is a problem of current resources(people, funding for budgets) which are limited and fixed even for a country as big as the US. Let's say you are a country and everyone you let in averages around 30 thousand in income each year but needs at least double that for things like housing, schools, etc as a one-time cost. Unless you are a country full of Star Trek replicators you can't accept an unlimited amount because your budget isn't unlimited. You should as a dynamic country accept a lot because of more people more power more taxes more researchers, etc, but that does not mean unlimited or even the rest of the world.
It's a balancing act for Democrats who are good people, but are also smart enough to know this policy problem. Let's say I was President Biden(Since Mayor Eric Adams faces budget problems, and has already asked the federal government for more money, and the fact that remote jobs are a thing in the future so city budgets may decrease) I would begin asking my staff for ways to stem the flow since the US is also facing budget decreases from the previous free trade era closing which means less GDP in the future and likely a recession due to this. (Less trade less GDP with everything else equal), while getting the current immigrants to be as productive as possible. It's crappy closing the door but we can't afford not to.