The transparency inherent in Blockchain has potential to fight corruption. Not only Bitcoin, but all cryptos.
Afris are a crypto being developed in Africa to fight corruption in development funding. It is very promising:
http://afri.africa/For it to really help, that is, for the transparency to work, it would need to be accepted by the governments and that is not going to happen. Believe, Africa is not the only continent with problems with corruption.