We are running our economy like a chain-letter scam. Tight labor markets are the right-wing answer to poverty. Employers provide health care when labor markets are tight, and employers of sweatshop labor do not pay their share of the health care costs for uninsured workers. Cheap labor discourages automation and technical innovation, which are the basis of long-term growth. It also encourages domestic servants and other forms of decadence, including nannies, which encourage women to work outside the home and break down the traditional family.
Industry just wants cheap workers.
Immigrant entrepreneurs are statistically rare, frequently specialize in bad industries like sweatshops, and benefit mostly themselves. Greenspan's comments are a clear sign of how the current elite has no loyalty to the well-being of Americans, but merely views the US as the best production platform for making money. Their ideal is free movement of goods, labor, and capital, leading to the liquidation of the nation-state as an impediment to making money. This is globalism, and make no mistake, it implies world government in the long run. Per capita GNP is the rational goal, and immigration lowers this by diluting our economy by poor, i.e. unproductive, workers.