I work at an MOS producing school, and one of the first things we do with the FNGs is have them introduce themselves, tell us why they joined the Army, etc.
Most of the non-native born are there because they want to give something back to the country that took them and their families in; most of the native borns are there because of the college fund or enlistment bonuses, and are not afraid to say that
Thank you for your input.