The problem is that any money sent to Africa is diverted by the despots to payoff their supporters. The money is used exclusively to keep the tyrants in power. That's why Bush said future aid will have to be tied to transparency in accounting, that foreign aid MUST be used, REALLY used, for specific, targeted programs to get the people fed, get them medical treatment, and the tools to begin taking care of themselves.
In Africa even more than the Middle East, the natives are hungry to TAKE CARE OF THEMSELVES, and will if the tyrants run out of money to continue their depredations.