Development aid is really hard.
A project that works well in one place or for a little while may not scale. Focus on administrative costs may make charities less competent.
Nonetheless, some useful help does happen, it's just important to not chase after the Big Ideas.
One of the charities mentioned in the article, Deworm the World, is actually a Givewell top charity, due to "the strong evidence for deworming having lasting impact on childhood development". The article, on the other hand, claims that the evidence is weak, citing three studies in the British Medical Journal, which Givewell doesn't appear to mention in their review of the effectiveness of deworming.
Givewell's review of deworming
Might be worth looking into more.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.