Right now the government steals a lot from the rich, steals a lot from the middle class...they're just really good at stealing people's money.
But, without government, wouldn't mobs of people steal more? Sure people can come up with their own private security forces but there are a lot of people in this world. If the "majority" wants your money...they'll take it. Sure they might go after easier targets first but eventually they'll go after everyone.
Does the government play a useful role in appeasing folks by stealing for them at a predictable pace?
I'm not saying it's right, just talking about the reality of it.
I cannot catch your aim with this post because go from one supposition to another. Normally can be made one supposition and discuss about that. There are to many the situations than can be created based at only such. If are two it is very hard to discuss. If are more it is impossible because needed year to give all that can be told.
Anyhow I am doing only a simple comment. Pretend to make in discussion the existence of the Government in one country it is more than a stupidity. Think that the people can be self organised to protect himself like this can be the only duty of an Government is a totally ignorance about the role of Government in a society and in a country. But even if so where it will be the difference between the Government which must not exist (because steal everyone and feed or use with the stolen money only the Members of Government) and the other elected part (after the disappearance of the thief Government) which will protect the other part of people (I am not going here to comment the supposition that the majority of the world population are thieves)? Both are elected from the people. Why the new ones must be better that the old ones? Why the new ones cannot enter at the thief Government and clean it? So create another Government not thief? It is much more easy to be realized this than the disappearance of the institution of Government and the creation of the new "thing" without name which must protect the people from the thieves.
All this above is written supposing that the Government is created only to steal the money from its people. Is only this the reason which is taken in consideration from OP in discussing the existence or not of an Government.