BS.
You have failed to understand that it is the taxpayers of SOUTH AFRICA that ultimately guarantee an Ex-Im guaranteed loan to support a purchase by Comair - NOT the taxpayers of the US.
Thats the only reason export guarantee loans work - because the government of the BORROWERs country guarantees to underwrite the loan - NOT the taxpayers of the lending country.
You ever negotiate one of these export guarantee packages? I have.