"People who live in first world countries don't migrate. Life is too good. However, when we start importing educated people from India or China who have engineering or science degrees, you'll hear a different set of Freepers screaming foul."
Certainly bright and successful people in first world countries would not be prone to immigrate unless induced to do so by better job opportunities or to escape the European welfare state (for the smaller American welfare state).
Which goes to one of my points. We don't need a lot of immigration in this country anyway. From the roads I travel on and the population statistics I see, it doesn't seem we're going to run out of people here anytime soon. As a matter of fact, we're adding millions at an alarming rate each decade. So we don't need to import millions to fill an unpopulated western half of our country. And those relatively few we allow in should be carefully chosen to be those who have unique intellects and can contribute to our country in a way no lettuce-picker can.
As to your second point, that foreigners with science or engineering degrees imported to this country by American companies will be resented, I have two thoughts: 1) if they are being brought over because there is a dire need for them that absolutely cannot be met in this country, then I say, bring them on in. However, we should also redouble our efforts to make sure we can supply future scientists and engineers from our own populace by proper educational incentives. 2) if they are being brought over because American companies want to save a few thousand dollars in salaries by dumping their American employees, then, no, we don't need them.
Immigration must be VERY restricted and must be in the interests of OUR country, not an escape valve for the hellholes of the world.
BTTT! And, there is always the matter of water out here in the semi-arid West... Do we need to crowd more people onto our poorly maintained roads, see even more trash, wait longer than four hours to be seen by an emergency room doctor, even when we are having chest pains?
Now, we do need lettuce pickers and chambermaids too, and I really believe these are jobs Americans dont want to do. There are plenty of more comfortable jobs available. You can see that by our low unemployment levels. Businesses can suffer if there are not enough workers to fill jobs.
Immigrants wouldnt be sneaking into the country if there werent jobs for them to go to. Theyd go back, and tell their family and friends not to bother following them.
Yes, we need to shut down our border. No one should be coming here without our permission, lettuce picker or otherwise.