The value of a combat robot is in avoiding casualties rather than cost savings. Casualties lose America wars, because it is a democracy, and it fights without an existential threat.
However, I think your numbers for the cost of humans are way low. The US army put the cost to train a soldier at $150'000. In addition, there is pay, and veterans benefits. The US will spend 1.5 trillion on veterans between now and 2022.
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The value of a combat robot is in avoiding casualties rather than cost savings. Casualties lose America wars, because it is a democracy, and it fights without an existential threat.
However, I think your numbers for the cost of humans are way low. The US army put the cost to train a soldier at $150'000. In addition, there is pay, and veterans benefits. The US will spend 1.5 trillion on veterans between now and 2022.