I don't deny that immigrants are beneficial at the moment. However, some people aren't going to have jobs. Besides, it's not as if noncitizens should be paid less just because they can survive with those wages. I'm saying that if the US actually cared for all of its people, I'll say present immigrants included, there won't be room for an arbitrary number of new immigrants. Are you going to try to stretch that limit until something bad happens? I have no interest in excluding people of "other races" or something like that, but pragmatically, I think the line needs to be drawn somewhere at some point.