I've heard the claim numerous times that people leave a tremendous carbon footprint. Each person would be assigned a certain amount of "carbon credits" that their life is worth, and the value slowly declines as they get older. If they choose to, one can hop in the expiration bin and donate those remaining credits to a cause of their choice: they can give them to their children, family, or friends, donate them to a charity or research group, etc.
I can just imagine the ads where companies try to compel you to take the early-expiration route while relinquishing your credits to them "for the greater good" or some other such nonsense
Children mass-produced for the glorious stream of carbon credits it would award
Microsoft, Amazon, Tesla et al provide "expiration tanks" in convenient places that send the credits directly to them after each "donation"
That’s somewhat similar to the plot of the movie Plan 75.
“In a dystopian alternate reality, the Japanese government creates a program called "Plan 75" that offers free euthanasia services to all Japanese citizens 75 and older in order to deal with its rapidly aging population.”