Definitely. Even if you just focus on the economic cost of the human costs (lost income for anyone who dies in early 20s, disinvestment in Iraq/Afghanistan by local people due to fear they'll be robbed or killed, etc.), that's higher than the direct military cost.
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It also completely discounts the human cost of warfare, if such a thing is even measurable.
Definitely. Even if you just focus on the economic cost of the human costs (lost income for anyone who dies in early 20s, disinvestment in Iraq/Afghanistan by local people due to fear they'll be robbed or killed, etc.), that's higher than the direct military cost.