Micro-loans
It seemed like the Grameen micro-loan banks had the biggest impact on the people in the film, with loans over $100 (unless this project was secretly a commercial for that bank). If a loan was used to fix-up a house, I don't see why a loan couldn't also have been used for the medicine that guy's wife needed to live or towards the stomach parasite medicine for the film maker.
One other thing, there wasn't really a need for these guys to leave the country in order to encounter real poverty, it's happening in America, right in their backyard:
http://rankingamerica.wordpress.com/2012/10/05/the-u-s-ranks-2nd-in-child-poverty-2/
"According to UNICEF, 23.1% of American children under the age of seventeen live in poverty, which makes the United States rank second out of thirty-five economically advanced countries ranked in that category. Romania ranks first, with 25.5% of children living in poverty."
Comfort the disturbed and disturb the comfortable