Open managers manipulate those above them in the chain of command. Because approachable managers have the talent to read and act upon the needs of their "bosses", they are apparent as helpful and reliable, or in a simple way, very useful. This allows them to get the "ear" of people above them in the system, and further helps get things done when needed.
Contrast this with the limited influence of the UN responsive manager. The unresponsive manager is restricted in influence because those around him/her do not respect or trust them to look out for their welfare. Influence is more limited to the use of power coming from the formal position, and fear, a motivational component that is hard to sustain over time. Unapproachable managers tend to be perceived as self-interested, or at best uninterested in the needs of those around them. They also tend to be perceived by those above them as less dependable and less useful due to their focus on empire building, organization protection, and self-interest, rather than getting done what needs to be done. Unapproachable managers are hard to communicate and they oftentimes get easily irritated.
