Subject: My thoughts
Author:
Posted on: 2015-09-16 20:08:00 UTC
A totally efficient, non-corrupt totalitarian dictatorship. This almost sounds sounds like you are setting up something similar to how the Soviet Union was (in theory) or even the Third Reich (again in theory) was supposed to be. I think then the answer is very similar to what Irish said. We have seen such a fictional representation, the Empire from Star Wars was very much the Third Reich in Space.
But the ultimate answer is anything could work from a theoretical standpoint if written well enough. But unless you establish your citizens as different, what ultimately will happen is people will project. And one such projection is absolute power corrupts absolutely. Now if you want to avoid strawmen, a way to do that would be make all your nations equally corrupt, just have it manifest in ways.
We do need to know a bit more about what you are actually going for to determine if your reasons are sufficient. However, if you want to make a sympathetic dictatorship, I do recommend you look at the Empire from Star Wars. Look at what makes them so popular. For example you could, as I think you state in another post, show that the galaxy is very dangerous and war is a common occurrence. There may be little in the way of personal freedoms, but this dictatorship has the only military truly capable of keeping its people safe.
Another approach you could do is look to earlier examples, such as the Roman Empire. Add and flesh out the culture of this dictatorship. Maybe they were or are a center of intergalactic trade. Maybe the greatest artisans of this era come from this dictatorship (a stretch sure, but it could work). Maybe they have the greatest minds in the galaxy. These are things you could give this dictatorship to make them more sympathetic and not a strawman.
I would like to know more about what you are trying to do. Without straight comparisons it will be hard to help you right now.