Excellent article. One piece of advice I have found helpful when delegating, is to ask the person to do the task vs telling them to do it. Seems minor but it I have had support staff give me feedback that it makes a big difference. Also, never delegate something that you wouldn’t do yourself, or all the unpleasant tasks.
As a manager, you are responsible for the competence of your staff. Educate them, be clear about what you expect regarding their abilities and quality of work, then take corrective action when your expectations are not met. They will do less as long as you expect less.