It's not (exclusively) about being poor or about drawing ambition from the current population. It's about having a vastly different perspective and background a

It's not (exclusively) about being poor or about drawing ambition from the current population. It's about having a vastly different perspective and background and understanding of how the world works. It's about being more ambitious than the opportunities presented to them in their home country, and having the tenacity to search for better ones on the other side of the world. This by definition makes them better entrepreneurs than nearly any American. You can't draw this out of the current population unless you place them so far away from opportunity, further than Detroit and further than Alaska. Which, it turns out, would make them a non-US citizen. America is a bubble, and most people growing in it don't understand that different places and people and cultures work differently. People from outside the bubble have a higher likelihood to think differently from the local populace to solve everyday problems, which is the kind of innovation that makes a unicorn happen.