You are not forced to pay income taxes anymore than you are forced to use toll roads to go to the grocery store or pay sales taxes when you get there.
A taxpayer can choose not to engage in activities which incur taxes, so long as he is willing to forgo his corresponding reliance on the structures of social trust and physical infrastructure.
A slave will be beaten if he does not work.
The hyperbolic analogy you are looking for is not slavery but a mafia protection racket.
