> They also have huge economies of scale. One of my grandmothers was one of 10 kids, and liked to relate that her parents always said it was the first 4 kids w

> They also have huge economies of scale. One of my grandmothers was one of 10 kids, and liked to relate that her parents always said it was the first 4 kids who were the hardest. After that, they start to look after themselves! Older kids act as babysitters for younger kids, etc.