Also, a lot of these earnings are being sent out of the country, over $20 billion a year to Mexico, exceeding their revenue from oil sales, and don't benefit the US economy. The low wages also depress American wages at the lower end of the income scale, thus increasing the wealth gap and reducing the middle class. If it continues, we will have the profile of a third world country.
If we can see this, certainly the experts we elected to represent us should be able to understand it. I heard a comment the other day that a Republican businessman would sell his enemy the rope to hang him with; it does seem to apply here.