Allowing all expenses to be tax deductible would reduce accounting overhead incredibly, and would incentivize consumption and trade.
Allowing all expenses to be tax deductible would reduce accounting overhead incredibly, and would incentivize consumption and trade.
It's obvious how to tax consumption. It's (fairly) obvious how to tax income. How would you tax savings?
Is buying stock in a company "saving" or "consuming"? Is buying Bitcoins "saving" or "consuming"? What about gold coins/bars? What about guns and ammo? What about a collector car? Artwork? What about a house for personal residential use? What about a house for rental/income use? What about just holding suitcases of $100 bills?
It seems like there would immediately spring up a system of "not treated as savings" savings mechanisms. I seriously doubt that you'd accomplish your intended accounting simplicity...
If I have a car to drive to work, then I should be able to claim some proportion of it as a deduction. Currently that's not allowed (at least in Australia, where I'm from).
There are even countries that have a modest tax on bank accounts.