As a civil engineering consultant with Haitian clients the reason I understand that the rebuilding has not been done is twofold. One, the international group largely responsible for the disbursement of the reconstruction funds, "the Clinton Commission" has been working to strike a deal with the Haitian government and investors in order to make the process as transparent as possible. That being said I think it's quite telling that they have supposedly decided to wait after the government changes hands in February which I would assume that there must be some grafting going on but that is just my opinion.