First of all, the labor is cheap only for the employer. The taxpayer must subsidize all of the other costs and the long term impact will be a Balkanization of the country along linguistic and cultural lines, i.e, the end of this country as we know it.
The US has the highest annual population growth rate of any developed country in the world [.89%] and our birth rate is 2.09 or at replacement levels. Even if we stopped all immigration tomorrow, we would still increase our population by 62 million.
You obviously didn't read or didn't comprehend the article I linked to you about the demograhic impact of immigration and how it affects the labor pool. Check out the sections on the impact on an aging society, especially just changing the retirement age from 65 to 68 and what effect that has on the availability of workers. Also, at the current level of net immigration (1.25 million a year), 61 percent of the nations population will be of working age (15-66) in 2060, compared to 60 percent if net immigration were reduced to 300,000 a year.
There are 54 million Americans of working age [15-66] who aren't working. They are in school, stay at home moms, disabled, etc. but many of the jobs filled by illegal aliens are because of the economics involved, not the availability of labor. The employer does not have to pay high salaries, benefits, SS, etc. to what amounts to slave labor. They realize the bottom line benefit, but people are not widgets that can be disposed of. The societal costs are enormous. You can drink the Chamber of Commerce Kool-aid about worker shortages, but the only real shortage is exploitable, disposable slave labor.
In October, unemployment rates for the major worker groups--adult men (4.3 percent), adult women (4.1 percent), teenagers (15.6 percent), whites (4.2 percent), blacks (8.5 percent), and Hispanics (5.6 percent)--showed little or no change. The unemployment rate for Asians was 3.7 percent, not seasonally adjusted.
It's not like those 65-68 are going to be picking oranges and grapes for the wages an illegal will work for....
Futhermore, look at the actual birthrate data: It ain't white women keeping us at replacement levels, and it's not the more educated reproducing. Successful educated white folks are afraid of having kids.
“...... the long term impact will be a Balkanization of the country along linguistic and cultural lines....”
.....I hope you’re right....that’s a nicer outlook than my own which is a Balkan style civil war.....multicultural/multiracial empires have a way of coming apart with great violence...wars of secesion and partition are a global reality....turn on the news any day of the week and you will hear...”sharp fighting was reported today between government troops and rebels in the break-away state of (fill in the blank)”....how long before that statement applies to us?
See: Thomas Chittum’s “Civil War Two”