From Mark Krikorian's article "Immigration, Saudi Style":

...one question has not been asked during the week the Bush proposal has been debated: What would America's labor market, and society and polity, look like if Bush's plan were actually implemented?

Some have suggested that immigration promotes the "Brazilianization" of our economy, as the rich benefit from the importation of servants while native-born blue-collar workers see their wages suffer.

This is certainly true with regard to mass immigration as a whole, but the president's specific proposals suggest a different country as a model: Saudi Arabia. That country, and its Gulf neighbors, are home to a permanent guestworker class, millions strong, lacking any real possibility of becoming full members of the host society. These foreign workers are very large in number, with the six million in Saudi Arabia accounting for about one-quarter of the kingdom's population. And they have virtually no chance of becoming citizens, even after living there for decades...

Terence P. Jeffrey makes similar points in "Just Enforce the Immigration Law":

If Congress enacts President Bush's immigration reform plan, liberals immediately will begin pushing to convert it into an unambiguous amnesty by asking questions the plan's Republican defenders will have a hard time answering: Can it be squared with our national ideals of meritocracy and equality before the law? Or will it create an unsustainable caste system in the American work force?

As President Bush explained it, the plan would transform "the millions of undocumented men and women now employed in the United States" and "those in foreign countries who seek to participate in the program and have been offered employment here" into a legally recognized population of "temporary workers." But, as Democrats will certainly point out, these millions will not be granted full political and economic participation in American society...

You'll note that the UCLA study from former MALDEF president Joaquin Avila called the current situation 'apartheid', suggesting that illegal aliens be allowed to vote. Under the Bush/Fox Amnesty, his plan would probably eventually be adopted.