An interesting statistic, don’t you think?

The productivity increase that resulted from $187 billion’s worth of
aid going on "public investment" in 22 African countries between 1970
and 1994 is a very precise figure: zero. The Ajaojuta steel mill in
Nigeria helps to explain why so much produced so little. The Ajaojuta
project began in 1979. Nearly 30 years and more than $5 billion later,
it has yet to produce a single bar of steel.

And another:

To the objection that a huge portion of aid disappears into the pockets
of corrupt officials, Sachs’s reply was that corruption is not Africa’s
main problem. Yet capital flight from Africa increases in direct
proportion as aid to the continent goes up: $94 billion left
sub-Sarahan Africa for Swiss bank accounts in 2004. That amount leapt
to an incredible $150 billion in 2005.