I do some work in Africa and that's not what i've seen. The NGOs have their own separate supply chains and are quite resistant to corrupt officials and local criminals. The problem with NGOs is that they're mostly regular business masquerading as 'aid' and out competing local businesses who dont have access to their infrastructure and subsidies. There's actually much more demand for NGOs from the West than from their recipients. African governments are trying to clamp down on NGOs, but there's a lot of pressure from the west for the status quo.