Some countries have walls to keep people in, some have walls to keep people out.
> the idea that people can just pack up and go to live wherever they feel like is incredibly naive.
That's how America was populated. In the last 5 years, millions of people walked from South America to the US. Walked!
The tax increases in New York, California and Washington have resulted in an exodus of wealthy people.
America was populated by giving people land in exchange for doing the hard work of settling the country so that the government could expand farther west. The land wasn't empty before then, but it wasn't populated like it is now either. It was hard work and bodies were needed so immigration was strongly encouraged. The existence of illegal immigration today is another thing entirely.
I have absolutely no problem with wealthy people who refuse to pay their fair share of taxes leaving. Good riddance. If they want to act like parasites let them leech off the people some place else. Eventually those people will wise up and ask them to pay up or get out too. It's that or bow down and spend their lives in serfdom to their rich lords and masters. I prefer freedom over robber barons.