Tax has to be voluntary because they know that if they wrote it into the legal codes, it would be in violation of Section 1 of the UK Modern Slavery Act 2015, which defines and criminalizes slavery, servitude, and forced or compulsory labour.
β€œThere is no code or law instructing any working citizen in the private sector to pay tax on the compensation for his labour” @Erik Cason @Jeff Booth @SatmoJoe this is something that bitcoiners need to be aware of.
#bitocin fixes this