It's in the public interest only because of the particular way that taxes work. If sleeping with someone was a taxable event, would that mean that it's OK to s

It's in the public interest only because of the particular way that taxes work. If sleeping with someone was a taxable event, would that mean that it's OK to spy on people's bedrooms? After all, it's in the public interest. In principle, I think that taxing only land ownership and pollution is the theoretically fair way to do taxation. And land ownership doesn't require obtaining any data that isn't necessarily known by the government in the first place.