Every other entity on this planet who wants to obtain money from another entity needs to tell them exactly how much is owed and exactly what goods and services are covered by that payment.
But the government not only doesn't have to report what work it did to warrant the payment, it doesn't even need to tell us the specific amount which we owe it; it's on us to figure that out... Figuring that out is complex and sometimes expensive too; many people can't afford. The gig economy is creating complex tax situations even for poor people. If we calculate incorrectly, then we suffer consequences. It's oppressive.
I know some people will read this and think I'm off on a wild tangent... But my friend, I'm actually addressing the core of the issue here. It's you who is on a wild tangent addressing superficial edge cases. The superficial cases aren't worth discussing; VAT, GST, CGT, income Tax and all other acronyms... Just don't participate in this system. Sell your business, change countries, go on unemployment benefits or whatever until this issue is fixed. How can a rational person operate in this environment? I can't believe some people work for fun. It's the most rigged, boring game ever.