This segregation leads to many psychological effects which research shows can create negative personality traits. For example, psychological research shows the wearing of a uniform will tend to make any person de-humanize people who are without a uniform. Just wearing a badge or a gun can cause people to act more aggressively. These are changes that could happen to anyone wearing a uniform, badge and gun, thus these factors are expected to operate in some way on the police officer. Sometimes this role leaks into their personal lives and changes the course of their relationships and leisure time.
Military organizations require the sacrifice of the individual for the good of society.
In a military organization, the focus is on punishing the individual if he is not up to standards. It is a de-humanizing process to recognize that you are only valued as a part of a machine. In an institution, you are locked in a set process and the process is more important many times than, not only the individual, but also the goal. When an officer does a remarkable job of police work, perhaps even saves a life, he can still be reprimanded if he doesn't file the proper paperwork. The paperwork describing an action in many cases is more important to the institution than the action itself.