I must strongly dissent. The investment in education-not-training often benefits society in other ways, which turn out to be indirectly economically beneficial,

I must strongly dissent. The investment in education-not-training often benefits society in other ways, which turn out to be indirectly economically beneficial, and directly and indirectly socially constructive; these lead in most cases on average to a greater happiness and complexity and learning in such a society, in a positive feedback loop. So no, I think the dismal bottom-line assumptions of your economics are sorely lacking.