How important is team building in a modern-day organization? How much of an organization's time and resources should be dedicated to team building exercises?
Pretty much anything accomplished of worth these days cannot be accomplished by an individual; so, building effective teams is critical in most organizations.
You question asks about "team building exercises." I'm not sure what that means, but as a manager/leader, I would work on a few things:
Common goals: Make sure the team has a clear goal. This sounds obvious, but this is overlooked far more often than most of us care to admit.
Over-communicate goals: As leaders, we overestimate how much or effectively we've communicated team goals.
Push responsibility to the team: The most effective teams take on responsibility for achieving their goals (assuming they have them). Once the goals are clear, the effective manager holds the team accountable and becomes a coach/facilitator, serving the team by providing what it needs from the outside to achieve it's goals.
Your parameters for leadership are well thought out. However, how can you make people feel the responsibility to your goal? To build a team you need a coach, like you mentioned, but achieving this respect is difficult. I have faith in your ideas, but your response lacks insight into how you will achieve them. Of course a clear goal is pertinent, but the drive needs to be there as well. You mentioned an individual doesn't have the ability to accomplish things of worth on their own, but I would disagree. People are needed, but a proper leader can work with any team towards a goal, even an undefined one, through persuasive management.