The efficiency reducing effects of official development aid

Despite considerable disbursements of official development aid the average annual per capita income in developing countries has increased only slightly. The prosperity gap between these countries and the industrialised nations has widened. In many cases the least degree of progress has been made in those countries receiving most support in proportion to their national income. Has the channelling of vast sums of official development aid turned out to be a failure? Or has it indeed hindered the development it set out to achieve?