I'm not sure that's an accurate representation of how things work in the tax world. You don't pay a tax when you pay a bill, but it's likely the recipient of your money includes it as income on their tax return. Same goes for any seller - whether or not a sales tax is involved. If you were to transfer a large amount of money from your bank account to a friend's, your friend would likely have to count that money as income on their tax return (as a gift).
The way the US tax code is set up, any income is taxable unless there's an exception for it.