That's such an interesting observation. The US has tons of poor places full of millions of people -- the Deep South comes to mind -- who could fill many lower-s

That's such an interesting observation. The US has tons of poor places full of millions of people -- the Deep South comes to mind -- who could fill many lower-skill construction jobs, putting downward pressure on the industry. But the distance between Mississippi and New York City is much larger than the distance between Poland and Germany -- both in miles and in ease of transit.