<Then a wage of $4 would attract people from countries in the world, including large countries like Mexico, China, Brazil, India, Indonesia, the Philippines.>
What nonsense.. how can anyone expect a truck driver to survive on a wage of $4 an hour in the US.
These are price adjusted figures. So your truck driver could buy double the goods in the US on $4 compared to back home. If he could survive on $2, he can certainly survive on $4.