Again, we see crony capitalism at work in immigration.
Currently one of the driving forces in immigration legislation and policy is the cost of skilled IT professionals...which developed countries need and underdeveloped countries can pump out millions of. Much easier for a corporate exec to convince his congresscritter that he needs to import workers than to backtrack on the economy killing line of crap he has already convinced his congressman was necessary.
And not the only example.
Few of us get the chance to experience the immigration nightmare from the other side. While stationed in Panama, I took the opportunity to shadow an immigration applicant through as much of the process as I could stand. This was the daughter of a friend, with extended family already in the US, who herself had legally graduated from high school in Florida while visiting the US on visa, with an immigration application on file then.
The process of CHECKING on the status of her application involved standing in line outside an embassy leased building for several days (you return to the same spot in line that you were in the night before when the embassy shut its doors, during the day there were people making money by acting as markers for people who had to go to work), when you get close to the door, you get to get shoved around the Marine embassy guards (and yes, it is a UCMJ offense to strike a lesser NCO which is why I didn't). And finally, when you make it into the building, you don't even get to talk to an American anyway...just somebody hired locally by the embassy to screen you. And no, I didn't hit her either, but by that time I was spun up enough that I might have if I hadn't been hustled out of there.
So, what we have created is a monster. I am far from being anti immigration, but there are several good reasons for limiting immigration to a rate where new immigrants can be settled in and assimilated into our culture: The first being simply that people come here because America promises freedom and opportunity. But we can't do that if immigrants escaping whatever sh*thole they come from establish little sh*tholes just like their motherland here. And secondly, some of the illegal immigrants represent a threat to our national security...they aren't coming here to assimilate, but to destroy us. And we can deal with that, so long as we don't let in too many at once.