In our bitcoinised future.
While we are at it, you could elect what department of gov those sats land from your wallet (10% military, 40% education etc), then every transaction becomes act of direct democracy.
We can but dream..
Discussion
Unless there are huge amounts of invasive auditing records attached to that, it's a donation.
If there are, this is a pain in the ass to administer. No different than VAT now.