Originally posted by Aramis:
5) TEO - An oligarchy of tech savvy folks maintaining a tech base, with elite education and probably some form of loyalty assurance devices (Intercranial remote control bombs, etc). The vast majority are allowed to fall to squalor, while the TEO takes what they need of the labor of the commons, in exchange for providing order through harsh but fair security forces with really good stuff. Requires some intact tech base which can be rebuilt without virus.
This could also happen on some of the few surviving worlds without a fully habitablt environments; whoever controls the knowledge (and/or spare parts) to maintain the life-support equipment could easily rule the population.
Generally speaking, I think that most TEDs, by definition, have a very narrow powerbase - usually the possession of some high-tech military gear or of other crucial high-tech items or skills. Take away the powerbase, and the TED collapses; take over the powerbase, and you become the next dictator. The smaller the powerbase, the more tempting it is for coup attempts, and the more vulnerable it is to guerilla warfare (after all, that single Company of TL15 Grav Tanks can't be everywhere at once; plus, every tank you somehow manage to destroy or steal
can't be replaced). So most TEDs will be more prone to have unstable polities than most other forms of government.
So, eventually, a TED is either replaced by another TED (same tech, different guy in power), collapses into barbarism or anarchy (Gov 0) when its tech dies away, diversifies its power base to become a more stable Feudal system (Gov 3 or 5), expands its powerbase to become a more stable dictatorship (Gov 3, A, B or C), is taken over by a Virus, or is overthrown by the people or another non-TED faction (and then it could become virtuallt any government type).