I haven't just added those in, I've used them to illustrate a wider symptomatic problem, but I've also included some links in there for discussion about the way aid is percieved in international development. I'd be happy to share more, but there is a huge amount of discussion on the topic and I'm starting to think it's getting a bit off topic for the thread.
I'm not putting a 'downer' on 'good charitable work' (which is an entire debate in itself), I'm suggesting that in some instances whether done consciously or not, there can be a perception, when providing aid of 'doing to' and 'knowing what's best' which can be derived from feeling inherently superior.
In any situation, particularly around charitable work, you have to face challenges around the balance of good vs harm. It's not an absolute position of harm vs good.