So what? They aren't citizens. If they can't support themselves, send them home. If there are unemployed or underemployed citizens who could do jobs, send home those workers, too. We have citizens who need jobs, and housing, and less taxes.
We don't need the workers; we can't afford the benefits as a nation. Do you have any idea the permanent damage that is going to be done to the economy if the fed just keeps printing and handing out money?