A truly democratic government also represents the collective will of the people. In America, we don't have a truly democratic government, but I think it's close enough to hold, to the extent that the justice system serves the desire of the people for the appearance of justice. The people can't know whether justice is happening, so its appearance has to substitute for this knowledge. This feedback optimizes the system to provide this appearance. I think we see major shocks when independent research and especially new methodologies for examining evidence (like DNA) disrupt the appearance that the justice is what's actually happening to the expected degree.