I don't have anyone in my family working as a physician, yet. But, one of my siblings is making arrangements to go back home and settle in far western region after his PhD. Not that he won't get a good paying job here in the sates, but he wants to go home and do whatever he can there. 
As for me, I don't have any intentions to stay in the states either. I want to go home after I complete my MD or PhD (trying to get into MD programs but it's hard since international students are not trusted with $200k+ of loans, if that doesn't work out, PhD is there for me) and work back home. Hope that answers your questions. 

You are focussing too much on the money, seems like you are one of those docs who runs clinic to clinic on a bike, or has someone in your family who does that or something similar. However, I agree that you can't isolate money from a medical profession, but when you become a doctor, that's not the only priority. Having a clinic in dense population centers would bring in more patients hence more money. If you think of it the other way, there are people in villages who are literally waiting for doctors to come and treat them. Why not earn money in remote places where nobody bothers to go? They are all your customers!

Talking about families, a person loses his 3 kids because they don't get timely treatment for pneumonia. Women die during labor because there are no doctors or nurses to deliver babies in remote health posts and hospitals. Are you and your capitalist thinking going to take care of their families? You see a doctors kid crying for a tricycle but you don't see a kid dying of diarrhea in Humla and Jumla, do you? 

Thank goodness there are still a handful of people like this German doc.