Unfortunately for them, as society becomes a bit more self-aware every decade, it's harder to find such people and they also throw away their best talent when questioning orders is unacceptable.
This is why I find it horribly ironic that there are military people now who are anonymously posting that they "didn't sign up to bomb syria" (and punish the chemical murder of 1000s of civilians). What exactly did they think they were signing up for? To pick and choose what orders they would follow? Does the person who sits at a desk in the military think they have better morals for not actually pushing the button that literally fires the missiles?
Imagine how moral the US would be if every government agency like the military, the NSA, the CIA, the FBI, the TSA had a draft instead of volunteers. They would actually have a consciousness instead of scandal after scandal because people would not just accept the system blindly.