While there's nothing new about the desire to give as much as (or more than) one gets, many of the means by which such charitable assistance can be delivered are quite novel. And these days the knowledge of how best to leverage both big-heartedness and the jargony lexicon used to describe it is constantly in flux
Many parents are right to be terrified about their kids' level of oblivion. Scheduled to the max, and investing their down time in an electronic matrix, many kids are lacking a skill we used to take for granted -- the ability to meet circumstances and challenges outside the lives that have been staged for them.
While I applaud the intentions of the voluntourists of the world, I think it is important for them to remain grounded in reality. They need to be constantly cognizant of their privileged positions to be doing development work in the first place and the limitations of both their time commitments and outsider status.