I've heard that once a contract is put up for bidding by the government, someone buys it out, and sub-contracts it out a step down the ladder. The sub-contractor sub-contracts it out again another step, and so on.
until eventually a local is taking a picture of some other well as proof and everyone gets paid and nothing gets done.
I couldn't comment on whether this has any truth to it, I've fortunately never been to Afghanistan and also I don't know anyone who's been.
after hearing it, it's hard to imagine things working any other way, looking at the fruit of the time and money.