The following thoughts on developing people comes from "The 5 Levels of Leadership" which is John Maxwell's most recent book:
People development by its very nature shares responsibility for getting things done. I say that because people development is more than just teaching. It's transforming. It invites people into the process of leadership because many things can be learned only through experience.
The first benefit comes to the people being led. When new leaders are developed, they become better at what they do and they help everyone who works with them to do the same.
The second benefit comes to the organization. with the addition of more good leaders, the organization's current efforts improve.
The final benefit comes to the leaders are doing the developing, because new leaders help to share the load.
One of the principles I teach is that everything rises and falls on leadership. Most people apply that concept to productivity but it also applied to responsibility.
"If you are successful, it is because somewhere, sometimes, someone gave you a life or an idea that started you off in the right direction."