The USA has needed immigrants for over 30 years to do the jobs that the average American wouldn't lower themselves to do, such as picking fruit, harvesting vegetables, delivering parcels, driving trucks for minimum wage and cleaning windows, just to name a few.
It's true what you say about Baby Boomers creating a vacuum when they all retire, because there will in fact be very few people actually contributing to Social Security, Medicare and Medicaid when the last one takes up residence in a Long Term Care facility early, after having gone through a 1960's and `70's lifestyle where drugs, booze, sex and rock and roll was the primary focus in their lives, which many Americans have continued with until their health eventually fails prematurely. What then?
If the US government were truly smart (which it never is), it would create an immigration program to bring those current 'illegal immigrants' on stream so they start paying badly needed Federal and State taxes and start contributing to Social Security. To do otherwise and turn away all immigrants that are literally landing on America's doorstep for free, the government will turn to Corporate America to fund taxation which in the USA, ain't gonna happen!
