[Tade0]

The many will quite simply stop having children, because why bother? Then the mgic box owners will attempt doing something to have a population to sell to, but that will ultimately fail.

It can be argued that it already started - globally the number of children born peaked around 2013-2017. The pandemic only accelerated the process.

[ChrisMarshallNY]

There was a short in the second batch of Love, Death and Robots[0] (Netflix), that had a cop, whose job it was, to kill children of "poors," as the rich could live practically forever, and didn't want the competition.

[0] https://www.netflix.com/title/80174608 (Volume 2: "Pop Squad").