If we can introduce a common governing system for the world without politicians I think it will be more friendly to the people. Government can be handled by group of people like this. That means same as what we do here in crypto. So there may be varities of ideas. Group of moderaters can pick the best ideas and apply them to the system. It will cut off the additional cost of maintaining ministers and will be more human friendly and real time updated.
Your idea should work in theory. I think that's how the United States started out. A group of people picked the ideas and applied a system. But I think the problem with that is that there's thousands of different parts of the government, things to look focus on, and so new departments, and now we're covering the whole world. For example the courts, that small group of people would not be able to handle the courts, cases, and still be knowledgeable/productive in thousands of other area. Eventually it's always going to end up in sectors who know more about their sector.