Re: Vava'u, Tonga
Bring them in some Mexican bean technology. They are as poor as church mice , but the only beans you can buy there are in cans. So they give themselves plagues of diabetes by spending their rare cash on spam and corned beef. Bring along several copies of "The Bean Book" by Rose Elliot, and start importing the ingredients, and you will save a lot of lives there, for the forseeable future.
Brent Swain, Boat designer, Builder, and author of "Origami Metal Boatbuilding"