@msbellows To be fair, my experience was mainly with the humanitarian side of USAID (OFDA, before it merged with Food for Peace to become the Bureau for Humanitarian Affairs), so it was at least trying to respond humanitarian crises based on need, per the fundamental humanitarian principles. I also collaborated with their Global Development Lab (a sort-of aid IT incubator), which was great.
On the development-aid side, on the other hand, nearly all rich countries use aid to at least some extent as an extension of foreign policy, rewarding friends, punishing foes, and buying favours/influence. I'm sure USAID was no different than, say, Global Affairs Canada, the Swedish International Development Cooperation Agency, or the UK Foreign, Commonwealth, & Development Office in that regard.