For Labor, I would suggest this-
Voluntary Labor = Community Good
Hmm, I don't know... doesn't give the Middle-earth feeling, if you know what I mean. 
Paid Labor = Community Prosperity
Same as above... but I can't think of much better.
For Legal,
Local Law = Town Law
Good one!
Tradition = Patriarchal, or Elder's Law
I remember Smeagol's grandmother was called a matriarch... I like that.
Council = Clan Council
Actually, that's not the Council I was thinking about; I was thinking of the Council of the Sceptre. So I think it should stay as Council.
Absolute Power = Tyranny
I like this one!
Civil Law = Community Law
Hmm, in my opinion this sounds too much like town law, if you know what I mean; towns and communities are almost the same... any other ideas?
And for Economy, I actually wouldn't have a problem with any of them. There's something in the back of my mind that says there's a better term than "Plunder", but really plunder is perfectly tolerable.
Perhaps Pillage or Loot?
Mind, these are all simply one person's hopefully helpful opinion. :]