When they get to 70 million they will vote to take your money.
You might not know this, but there are at least 70 million in Mexico who would come here in a heartbeat if the immigration rules were relaxed. Thats in addition to the 20 or 30 million who are here. If you add it up, 100 million mexican nationals could very significantly influence our elected officials. Our country would go from a population of 300 million to 400 million in an instant.