You’re an anarchist right? So you believe there should be no government whatsoever. My answer to that is that you should read Thomas Hobbes. As a person with a disability, I depend on the government maintaining a monopoly on violence for my continued existence. Without the rule of law, might is right, and I would be toast.
It’s true that money isn’t of value per se, only the resources it makes a claim on. Austrians don’t actually teach that, which is why they say interest rates should be set by a free market and not central banks.
Governments don’t spend the money they tax. They create money when they wish to spend, and taxed money is simply destroyed upon receipt. You can argue about the philosophical nature of what they’re doing, but those are the raw mechanics.
As an anarchist, you believe the government shouldn’t exist. If you accept that it should, as I do, then you acknowledge by extension the necessity of its provision.
Creating a tax obligation denominated in the government’s own currency is what gives that currency value. That then allows the government to go into the marketplace and buy the goods and services it needs. It spends the money first, prior to collecting it in taxation. If it didn’t, where would the denominated currency come from?