> From an outside observer's perspective, the results are not as strong - the budgetary, humanitarian, environmental, collateral, and political costs of most of the military engagements of the past 50 years have been quite bad.

For the most part, all of those issues fall squarely upon the leadership. Military personell have a duty to fufil lawful orders, and you can't simply resign and take a different job if given a lawful order you don't think is a good thing for all of those reasons.

In contrast, when working for an employer, you have at least some ability to refuse to do things you don't think are a good idea. Worst case, you're fired or resign and need to find other work. But you're very unlikely to be court martialed and imprisoned. Or even sued.