This is why I don't trust anybody who tries to tell me that human population growth is an actual problem and not just our rulers' fear of irrelevance.
* the ability of collaborating groups of humans to achieve/produce scales super-linearly with the number of humans[1]
* the growth of human population is causing problems, and is likely to cause more problems in the future
One reason is the scarcity of resources[2]; another is that "humanity" as a whole is not collaborating with all of itself.
[1] actually, I don't even think this is true, beyond some limit - but it's true for small groups
[2] which could be mitigated somewhat by fairer allocation of resources, or by process changes to focus more on fundamental needs; but, still the fact remains that the resources that we have access to on Planet Earth are limited, and access to extraterrestrial resources are extremely expensive
Seems to me any other system is open to being gamed. Sure there are people born into generational wealth. But those are like one in a million and generational wealth doesn't typically last more than a handful of generations as the number of descendants grows exponentially.