Milton Freidman came up the idea. Have a predetermined set of rules that the chip can follow. Eliminate any human error or bias and you have devoloped a fool proof system for determining fiscal policy. He talks about it in his book Capitalism and Freedom In this new economy, information travels at the speed of light, and any meaningful changes must be made quickly. We can't have some 90-year-old man fumbling around and screwing things up. We need speed and results.