Taxation is on a par with forced labour

In Anarchy, State and Utopia, Robert Nozick says that taxation without consent is on a par with forced labour.

Here is my attempt to reconstruct his argument:

1. Taxation without consent consists in taking n-hours earnings from a person without consent.
2. If something consists in taking n-hours earnings from a person without consent, it is on a par with taking n-hours of work from a person without consent.
3. If something is on a par with taking n-hours work from a person without consent, it is on a par with forced labour.

Therefore:

4. Taxation without consent is on a par with forced labour.

(Reconstruction by Terence Edward.)

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