[A. Pole]

"In free market context the wages are seen as the cost/expense/necessary evil so the market optimization will bring them to the minimum."

Actually, depending on the model you use, it would stabilize below subsistence.

You have a point. BTW, the open borders policy is designed to provide the employers with the very cheap labor BELOW the subsistence level.

How is it possible? The immigrant workers live in the conditions not sufficient for normal families (like several young men sharing the small apartment), getting the medical services in emergency for free and including in their costs/gain calculation potential US citizenship (the last means allowing private employers to use citizenship as a part of pay package).

[redgolum]

One of the interesting things I have seen is what happens to the kids born to the illegal immigrants.

Most of them start complaining about the "other" illegals driving the wages down!