I agree in principle, but obviously taxes aren't going away and there are degrees of consent that matters.

Pure libertarianism is utopian, it's just not going to happen. People who need stuff to live will always use force to take it from you. You can cry about it and shout moral indignations, but the truth is that they are not stopped because most people feel that taxes are morally justified, and they consent to them. The degree to which a population consents to a tax, versus being coerced by a coordinated and powerful minority who exploits them, is the degree of "voluntarism" that I'm describing.

The reality is that the vast majority of people want to live in a world where the government taxes the population equitably and transparently to pay for stuff like fire brigades and water treatment facilities, however utopian it is to believe that the right to tax is then limited to basic public services & utilities.

In other words, getting rid of fiat sets a more reasonable limit on governments capacity to tax.

If I need bread to live you can call me a thief but if you try to stop me I will kill you. Maybe I'll say "yeah, so what?" What's your point, that society must be morally pure and cleansed of all indignity and injustice?

You think you're being clever but it's really just delusional solipsism and sociopathy.