The problem comes when the state takes it at the point of a gun, which is always the end game for them.
IF I "agree to give it away" as you put it, then it is not robbery. Yes, we agree on that, but that is a very big "if."
That is not how the state works, although they may pretend to work that way. For example, in the U.S.A., the federal government tax collectors (IRS, Internal Revenue Service) like to call their taxes "voluntary compliance," one of the most amazing oxymorons in history. The problem is, if you don't volunteer, they send men out with guns to help you "agree to give it away."
And so, if the state were a moral entity, it would simply ask for donations. I have no problem with that; it is called voluntaryism. Sadly, I know of no modern state that practices it.
I think it was Murray Rothbard who asked us to imagine any group of people doing an action that the state does. The immorality of the state action becomes immediately apparent.
Hello, @endlessknot, thanks for weighing in.
Just stopped by your blog, read and voted for your (two) articles, and clicked "Follow." In at least the realm of widely varied interests, I can see that we're kindred spirits. If you want to see a real hodgepodge of eclectic articles, click this GIF: 😄😇😄