The amount of time you had to live was a literal unit that could be traded between people as currency. And I think nobody aged, you stayed at peak physical form until the day you ran out of time and then you dropped dead.

My memory of the movie is hazy but time was artificially scarce, right? The question of eternal life had been answered, but they still imposed deaths on people in order to maintain control? So the lower classes were constantly living from paycheck to paycheck with only a few days or weeks left, while the super rich had millennia of time stored up, which was functionally useless to them.

Yeah, it was a pretty good idea now that I think about it. It could've done much better as a tv show or even animated series that explored the world in more depth.