> a few human laborers can do the same job with enormously less fuel cost. and this is where you're wrong. humans have to live in society. the cost isn't just

> a few human laborers can do the same job with enormously less fuel cost. and this is where you're wrong. humans have to live in society. the cost isn't just food. you need to pay for housing, their electrical bills, water, food, entertainment, children, their 2,000 lb machine to get to work... suddenly that 10,000 lb machine with lasers is pretty cheap.