Look at the caveats the aid is given with. Look at the instances where that "aid" has to be spent on things that is dictated: "we give you this 'aid' which you must use to buy xyz from 'us'.
And to the other post about corruption, don't be so naive to think this is just a problem for the 'natives' to control. The aid giving countries know who we are given it to and what will happen to it. This is planned so that our interests get what they want. The corruption is complicit, maintained and wanted by western countries just as much as it is with the locals who benefit from the corruption