What you need to proove is that without an established authority (except the one I described), a new authority will very rapidly rise.
You should have realized before you posted this that said proof already exists.
That proof is nothing more than world history itself. Bodies of authority have been overthrown many times for far longer than recorded history has actually existed. In every single case, a new authority quickly arose to replace the old one. Some were good, some were bad.
There have been many cases where a government was overthrown and the country in which it happened did
not acquire a new government right away. In other words, for a period of time,
no authority was present. During these periods of anarchy, the results were always chaos and extensive human suffering. And in the end, the final result was the same as above: a new authority arose to take the place of anarchy.
There. Proof provided. Every time a government authority has collapsed in human history, another has risen to replace it.
I'm not about to say this society will never in all eternity become corrupt and turn into something else, I'm simply saying it will be stable. The milgram experiment won't help you, because it has only one authority, whereas in this case there would be two authorities, the directly democratic system I described, and the hypothetical power hungry person trying to take power. You have to proove that the power-hungry person/group will usually prevale.
Will do. In order to do so, I ask you this question:
Greenpeace: how many instances of your ideal government have existed in human history?
I already know the answer: very few. I know that because you're in this thread complaining about the lack of your ideal system. See? Most governments are the kind you hate. Therefore: evil power-hungry groups that Greenpeace hates, usually prevail. I'd say I was sorry to break the bad news to you, but the real truth is I actually enjoyed it immensely.
How is not providing a house and food for Greenpeace a negative incentment to you?
If you need a house and food, and I refuse to provide them, I am doing harm to you, am I not? And one of the basic tenets of your ideal society (your ideal,
not mine) was this:
The first exception is that there needs to be an authority to stop and prevent people from harming each other.
In order to avoid violating this tenet, I must provide food and housing for you--but I don't want to. Which means one of your other basic tenets is violated:
No real positive incentives exist except the incentive to do what I naturally want to do.
Now, no government is perfect--there will be conflicts between various laws now and then, no matter what you do--but your system will trip over the above contradiction constantly. It simply cannot work. Out in the wild, it's usually the second Greepeace tenet (do whatever you naturally want to do) that is followed most closely, and the first (do no harm to others) is violated wholesale. If we institute your system, that's what's probably going to happen. But one tenet or the other must go out the window, and the moment it does, your ideal society degenerates into either a violent free-for-all or a totalitarian state.
Edit: Thumbs-down on that spoilers-only style of posting, Greenie. It was pretty confusing, and I had to re-read everything several times to work out which parts were actually you talking.