[JohnDeHope]

If people know when the money will expire, they'll accept it at a lower and lower value as it approaches its expiration. Money that will expire tomorrow will be worthless. I think a better way would be to continually reduce all (digital) accounts by some rate. Say you want 1% depreciation per year. At the end of the year, every bank account balance is multiplied by x0.99. The "money" evaporates equally for everyone at the same time. In any case though, while technocrats might like the sound of all of this, the plebs (aka those of us without political power) are likely to be less enthusiastic.

[dnautics]

They probably won't notice, since that's what happens now. Not even smart people with econ phds notice.

But whether or not anyone notices, the math is simple: it will be very bad for lower income levels. If you have 1% depreciation over a year, and you are spending 90% of your money on day to day expenses, the relative loss in margin of survival is far worse than if you are spending 20% on day to day expenses.