ECONOMICS

There is an excellent analysis of the economic consequences of migrant workers at:

http://www.populationenvironmentresearch.org/papers/Colemanmigration.pdf.  

An excerpt follows:

"Business interests however are short-term. Easy immediate access to labour will always be preferred to the costs of training and capital investment for the longer term.  In the nature of economic cycles, yesterday's essential labour can often become, as the defunct factories and mills of Europe have shown, today's unemployed. Employers who demanded immigrant labour are not held to account for this or required to contribute to subsequent costs of their unemployed former workers. Few things are more permanent that temporary worker from a poor country. If business were made responsible for the lifetime costs of their migrant labour in the same way as they must now deal with the lifetime environmental costs of their products, perhaps enthusiasm for labour migration might be moderated and make way for longer-term investment in capital-intensive restructuring."

Open borders proponents promote the economic benefits of illegal aliens (exploitation of underclass) to the US economy but research shows huge costs to taxpayers.

Mass Immigration Cost American Taxpayers $69 Billion Net and 2 Million Jobs in 1997

Immigration's Impact on Public Coffers