This is a central issue, the dichotomy of justice and government. To govern is to stear or limit, as in setting the course for a ship of state. However, a captain stearing a ship does not depend upon classical Aristotlelian logic alone. Neither does justice, but all astractions of national government articulated to date, that I know of, do.In order to achieve justice, we need to be able to compromise to come to some agreement about what justice actually is.
To create a truly new government then, is not merely a question of shuffling the deck. It is more pointedly a question of inspiring and making popular new concepts that transend the old. "Freedom" was a popular theme in the creation of the american government, for example, even though freedom in an increasingly dangerous, polluted, and resource strapped world is beginning to sound insane to many. At the time it was proposed, however, it was radical and refreshing and it has proven durable even in the face of the more unpleasent realities of life such as I have just mentioned.
Thus, if you are to help create a more responsive and socialist world, it must have a motto or central theme, or concept around which it inspires organization. You can modify the already existing themes if you want, or get really creative. Both approaches are time honored, but the creative is of course the more risky. :0)