What's weird about this is that there is actually **SOME** amount of PoW in printing physical paper money.
The VAST majority of money printing is literally done with a couple key strokes.
Discussion
Denomination Variable Printing Costs
$1 and $2 2.8 cents per note
$5 4.8 cents per note
$10 4.8 cents per note
$20 5.3 cents per note
$50 5.2 cents per note
$100 8.6 cents per note