In college I had support to do something very similar to engineers without borders just under a different name but in conjunction with the program. They required a certain donation level to ensure that the work we did had the needed materials paid for and could compensate the local workers involved. That's what I was told. I wasn't auditing anything but it seemed above board. I was able to engage with doctors without borders members while there. All were committed to the cause. Many were from the same part of the world if not "state/province" and giving back after they were able to make more money elsewhere. Just about all were hardcore. We have 5000 to treat in 7 days type of hardcore. Bedside manner wasn't what you'd expect in the US, but it was about helping as many people as you could as effectively as you could. Truly eye opening though. I can't say anything about the organization, but the people who were first hand there either gathered the donations or donated themselves and went there to make a difference. I respect the hell out of those people.