Well, that's probably because people don't understand what "traveling" means. Sure, for covering the hostel fees, the evening margaritas, and an occasional ride on a camel, I would not donate a cent! But, as you said, for people who are actually doing the work which our 5-to-9-ers can't do, it's a whole different story. And I believe it is up to us to make this distinction clear: though traveling is a major part, that's not what the trip is about.