Concerning leave the question blank, that is a good point/question.
My question is what are the consequences of leaving the question blank? A person is being asked to inform on themselves followed by signing the jurat under penalty of perjury. Perjury being a criminal offense. Pains and penalties ...
Perjury being the intentional act of swearing a false oath of falsifying an affirmation concerning matters material to an official proceeding.
Government has since time immemorial assumed (and exercised) the power to lay imposts, levies, and excises.
Whether the currency is two-name paper (Federal Reserve Notes) or gold and silver coin is irrelevant in my opinion.