What are some

What are some advantages and disadvantages of delegation? Why do some managers choose not to delegate? What has been your experience with delegation? What did you learn from that experience? 

What is management's role in organizing human capital? Does this role vary from organization to organization? Why or why not? 
This is something I have been thinking about lately when we talk about being let go from a company and finding a new job. A colleague of mine made the comment that "the issue is human capital. I can't get the job I want because everyone is promoting from within. The challenge there is if a company isn't hiring from within, what does this say about that company?"