If you can find somewhere I can go, and take my mother who is a full time wheelchair user, I'll do it. I'll pack my shit and move today. It's just not feasible. The American education system means I wasn't able to go to college until my 30s, and I'm only half way through a bachelor's. Don't nobody want us.
Even if they leave, they still have to pay a percentage of their earnings to the US government in taxes each year. Regardless of the country they're in, or if they ever plan on returning.