Where are the lines of obligation drawn? Do I owe allegiance to my home country, which is a political entity with arbitrary borders? If so, why? Or do I owe my efforts and talents to the poorest people? Again, why? Or to all humanity? To my family, to like-minded individuals?

If you think it’s wrong for me to have emigrated for a better life, well, off you go then, you go save the people of Africa.