There are very few essential men. Virtually every foreign worker here in the U.S. is here because they work cheaper. That's it. It's not because their skill set can't be found in the U.S. because it can, but most likely it can't be found in a workers willing to work for less than competitive wages.
It's the same with manufacturing. Everybody wants a blender for $10 so we bring them in by the boatload from China, it would cost "too much" if they were made in the U.S. by Americans. With every $10 blender you bring in the Chinese standard of living by costing a U.S. worker that job making those blenders. Consumers love it because they get cheap products, grandma likely couldn't afford a blender but Susie the trailer queen can buy one since it's only $10 at China Mart. American workers are out of a job but the owners of appliance making companies are grinning all the way to the bank since a $10 blender now brings them 90% profits instead of 15% they used to make on U.S. made ones.
Meanwhile middle class America gradually disappears and the living conditions slowly begin to resemble the Chinese and Indian lifestyle. We're making our citizens compete with them for jobs so it's only natural that our lifestyles will merge also.
Have you ever been to India or China and seen how the average person lives? I have many times for work, I can tell you it's miserable. China and India are dumps to put it mildly and the average citizen lives in squalor. That's what we're turning our country into when we import third world labor and third world products. There is no free lunch.
A few years ago I was working in the Los Angeles area, and I occasionally saw a trainload of shipping containers heading east.
For every one, I mentally remarked “There goes another trainload of American unemployment”.