Productive managers
A key task of managers is coaching and developing staff. A fundamental challenge in organisations is to release managers from an expectation of doing the work, going to meetings, and replying to emails, to allow them time to plan, organise and supervise the work instead.
Many managers are not comfortable dealing with others' career development, possibly because they don't have time: they are expected to be as productive as their workers.
Developing employees for future positions is an intangible and almost immeasurable task. Managers seem to be expected to address today's problems, rather than prepare employees for possible future positions.