I guess I just don't really understand the difference you are trying to impart. To me, money spent on CIA operations is money spent on CIA operations, regardless of where it comes from, or what sort of accounting tricks they might use to to hide it. Does it have to go out through payroll to technically be 'funding itself'?
I don't think anyone said tax dollars were spent on that particular endeavor. If they had been there would have been no need to fund it through illicit channels.