Taxes will not go away. The systems will get more efficient. Im a libertarian socialist but I also understand that its extremely difficult to implement the ideas that have been thought up by Noam chomsky,robert nozick and others. The issue of taxes and how tax dollars are spent will be a issue regardless if there is a centralized or decentralized system. I think we are going to need to have a system where you a both existing simultaneously. Good read though.