Agence France Press quotes Special Inspector General for Afghanistan John Sopko's address at the Atlantic Council:

Special Inspector General for Afghanistan John Sopko termed it "spending on steroids" triggered by the war effort, but criticized the lack of proper audits and oversight, saying "we don't even know what we spent, where we spent it, 12 years into this."

The billions of dollars spent on the impoverished country has allowed corruption to flourish amid a weak and overwhelmed government, he told the Atlantic Council think tank.

"Allowing corruption to continue unabated will likely jeopardize every gain we have made over the last 12 years. In other words, rampant corruption may be the spoiler for 2014 and beyond," Sopko warned.