Okay, I didn't understand that part at first. Sounds better now, but you'd still have an organization, that has basically limitless power as there are no laws working as guidelines or barriers. And even while the police / court are independent from the government, there would eventually be lobbying and persons in power making favours for each others, accross different institutions within the governing elements of the country. This would result in corruption and unfair distribution of power, and most likely wealth.
Yes, I'm not trying to defend democracy as the perfect system. Power corrupts, and there is no such a leader, who wouldn't take advantage of his / her position if they have the opportunity to do so.
My point, however was about revolutions (meaning series of events, that lead to change in the doctrine by which a country is ruled) often turn out something else than what was promised to the people, or even what was first planned by those stepping into power. In another words: your system is undobtetly meant as a step forward, but the fact that you set no boundaries (also known as "laws") for your governing elements, would in my mind, and as shown by history, most likely turn into something different. Not necesseary immediately, but by time it would slip from it's original purpose into something else.
{omitting part about police investigative theory}
All in all, it's a good theory, utopia if you like, but I would most definately oppose such a system, if for some reason they decided to change our current system into that. And by reading the posts in this thread, you can see, so would most rest of us.