I don't necessarily agree. That could be an outcome, but it would require policies or voluntary restraint to get there. At least in my country (Uruguay), the l

I don't necessarily agree. That could be an outcome, but it would require policies or voluntary restraint to get there. At least in my country (Uruguay), the lower earning 8% have 30% of the children, placing a huge strain on society and services (I don't see robots replacing medical and social services anytime soon). So, to enable a sustainable society like you propose, something like a two children per couple rule should be enacted (hopefully nothing so harsh as the Chinese version).