The stupid thing about an "artificial" political system is that it will generally just come down to a grind. For example, in TERA, the political system will probably just end up being a gil-grind or Boss grind, rather than an actual reflection of sociopolitical system, and therefore fails at the thing it is trying to achieve.

If the system came about organically (players build their houses, build fortifications, and communal investments) then it would make more sense in an MMO due to the fact that it actually fosters community. The artificial, dev-made political systems merely foster grind.