> Or having kids is somehow constrained now through other hoops, like a "procreation license."
Possibly, though better educated and better off people tend to have fewer children so there are other ways to limit population beyond strict China or Ender's Game style limits.
Or maybe asteroid mining will finally break and crash the whole materials economy making everything but space, food, and water extremely cheap.
My point is this: universal BI requires some level of population control (to prevent poverty and misery), and eventually some level of reproductive planning.
Universal BI leads to universal resource control.
So really, those who multiply the fastest win the resource war of the future? Or having kids is somehow constrained now through other hoops, like a "procreation license."