Countries with smaller population, smaller geographical area, or more homogenous culture are at some point more comparable to individual states in the US than the United States as a whole. "Federated" isn't very meaningful relative to other metrics when making international comparisons.
For the sake of presenting the alternative perspective advocating the abolishment of involuntary schooling, I would recommend reading the following piece by Cevin Soling: http://www.forbes.com/sites/jamesmarshallcrotty/2012/02/27/w...