If, after tallying your net worth, you have cash leftover at the end of the year, that should be your tax bill – individual, proprietor, corporation, even including banks.
Money is meaningless. Currency, no matter the backing (or not) commodity, doesn't mean anything. It is only a conduit for trade between individuals, corporations, and nations. When you hoard, you remove value from the economy. Unless your net worth is tied up in real property and you've spent the rest on consumables, services, and investments—all four of which would necessarily entail putting your money back into the Great Capitalist Machine—you are actively working against the engine of economic progress.
“But what if I go broke?” Two things: First, the economy shouldn't care if your purchases are stupid or not, it only cares that your money is doing something (but try to not make stupid money moves). Second, that “whatever's left” at the end of the tax year, that's what should form the basis of a new national budget with a focus on Universal Basic Income, money after non-discretionary national obligations to be remitted to the people in fair share.
This is the only way trickle-down economics works. And if you need something that's going to require years of saving to pay off, get it on credit, buy it on layaway, or put your money and the item in escrow. The economic tools to make this work already exist, folks.
More to come as I descend further into Librarian Socialist insanity.