I believe that this is a lack of understanding of the global benefits of free market capitalism among students.
While all of these "engineers without borders" and "development engineering" things are nice, they are pretty insignificant in terms of actually enhancing the wealth and well-being of poor people in developing countries versus good old capitalism - where those poor people have the opportunities to make things and perform services of value to other people.
Deng opening up China to the global market has brought hundreds of millions of Chinese out of absolute poverty (making under $1 per day) through market exchanges. China did not have large amounts of foreign aid. They just made it OK to carry on capitalist trade.
Instead of setting up Wi-Fi in a poor village, it would be far better to teach the local people about the importance of secure property rights, the needs to reduce regulation to reasonable levels for a poor country which both enhances commerce and reduces the level of corruption, the needs to allow for free trade for imports and exports. And hopefully they can change their democratic government to enhance economic freedom, and if their government is not democratic, other solutions may be required.
If you want to know why a country is still poor, go read its entry in the Index of Economic Freedom.