It should be the exact opposite and the taxes should be a fraction of what they are because the coins have remained sitting there and unspent. I feel like that should be rewarded and not taxed. Its insane with all the taxes the days, sheesh just give us a break EH?
The idea is to pay miners to secure the network. The talk was given at a Monero conference, and Monero very early on forked to add a so called "tail-emission", which provides a perpetual block reward of 0.6 XMR in addition to tx fees. There are theoretical attacks that may become economically viable/attractive if the block reward portion of Bitcoin blocks was zero, or near zero. This can sound abstract and far-off since block rewards last until 2142 or whatever, but, Bitcoin block rewards become very small in just another three or four halvings, so maybe another decade or two. I guess if someone hasn't moved coins for a long time, they should pay the miners for all that time they received security. Most likely if it was added to Bitcoin (which Todd claims could be done via softfork) I guess the wouldn't retroactively tax people and begin the tax on date of adoption, but I agree with most here that I don't think it will ever be adopted. Just figured I would share and stir the pot a little bit here
Braiins has a nice article about it that discusses tail emission and demurrage approaches:
https://braiins.com/blog/bitcoin-fees-security-threats