These are the only things that can be argued as valid.  I agree with you 100% that no government has ever stayed within these parameters and that government always becomes so big that it causes more harm than good.  If it could just do these things, I could live with it.  Unfortunately it is always corrupted and begins to harm life and property instead of protecting it. 

 Yeah. I guess most of libertarian or ancap people could live with it. Just because it is so much less of a state then we have now 😅
But it is conceptually and morally still wrong.
Either it is voluntary or not. If it is not then it doesn't matter on what the robber spent your money. 

 That's the conclusion I have come to.