Ministry is not best talked about in hours-worked at all really.
Ministry payment is not a wage paid on a per hour basis or a salary for a full-time or part-time job. Not really.
Better to think of ministry payment as a stipend to free someone up for the task. Any particular tasks, duties, meetings, hours that might give some form to this are very much secondary.
You are paid to be freed up to be you. You are paid to be freed up to fulfil a role. Particular tasks or particular hours are a sometimes necessary and very inadequate proxy for this.
via Blog - Christian Reflections http://genevapush.com/blogs/xian_reflections/ministry-work-hours-2-stipend-not-salary (NB: to comment go to thegenevapush.com/xian_reflections)