Involuntary takings are theft regardless of who is doing the taking.
Or how.
Taxation.
Taxation and theft are of two different categories...
Also, I would NOT categorize taxation as an involuntary taking.... ... even though there are some difficulties in electing within which society (community) and set up that we want to live. The role of government tends to be a complicated topic... and such topic has been especially inflammatory from time to time....
Oh yeah, and theft within the government can be quite complicated as well.... yet mostly different from the kinds of thefts going on in bitcoin circles.