[samjc]

The good news here, is that many countries have double taxation treaties. So that you don't get taxed by 2 countries for the same income. https://en.wikipedia.org/wiki/Tax_treaty

[innocentoldguy]

Only to a point. I think the limit is around $100,000.00 nowadays. Anything over that gets taxed by both the country you live in and the U.S. (if you're a U.S. citizen).

[SirLJ]

The problem is if you do business in tax free zones for example...