Granted
The dynamic of the reserve component (in which I now serve) is different on many levels.
For instance if you are a company commander, your driver may be your boss during the week. This leads to a very egalitarian relationship between officers and enlisted. In my experience this has not translated to poor battlefield discipline, although I certainly see the opportunity for that to be a problem.
The nation building issue is partialy due to self-identity (though I had not thought of that until you brought it up), but primarily due to every soldier bringing another set of skills to the table. Your tank gunner is also an AC repairman, your chaplain is also a lawyer, etc.
Hope this answered some questions...