It may be possible to conduct a government without direct taxation of individuals, but by causing the government to engage upon services to the population which obviate the necessity of personal taxation and all the ills to which that is prone. It is highly possible that a government only enters upon individual taxation when its ability to produce service for its citizens has dropped below the point of non-existence.
A government is justified only so long as it serves the people. A business goes bankrupt when it is not voluntarily contributed to. A government goes Fascist.