Taxation is slavery. From Jeff Thomas at internationalman.com:

I believe it’s safe to say that most all of us sympathise with anyone who’s living in a condition of relative slavery and, if he has the courage to attempt to free himself, we root for him to succeed. Those of us who are the most compassionate would even offer him support in his quest, if we were called upon to do so.
But few of us think about slavery as being a modern institution. We tend to see slaves as victims of a racial divide who suffered disgracefully in times gone by.
So, we should take a look at the definition of slavery. In essence, it’s a state in which the product of an individual’s labour is forcibly taken from him. (His condition may include abuse, bondage, etc., but these are symptoms, not a definition.) The purpose for enslavement is always the same: to obtain the fruits of the slave’s labour, without mutually agreed-upon compensation.
And so, if we look at the bare bones of the definition, we easily recognize that if all of the fruits of our labour are taken from us, we are entirely enslaved. If a portion of those fruits is taken from us, we are partially enslaved.