[AdrianB1]

How about we make taxation as a fix amount per citizen and then nobody needs to declare their income OR land? And it is equal and fair, as in "pay your fair share", and that's it: you are a citizen, then you pay $X as your contribution like everyone else. Problem solved.

[iamnothere]

Flat tax is also a possible solution, but a truly flat tax would probably have to come with substantial welfare for the lower classes, as the tax burden would fall disproportionately on them. (This is less about “fairness” and more about preventing bad outcomes like mass criminality and/or revolution.)