We both work long hours, DP is a consultant in a hospital, I am a pharmacist in the same hospital.
It's not greed related, it's just selfish when people get critically ill and need their drugs/operations in the middle of the night on too of normal shift work there's on calls too and it's nothing for DP to work 12 days in a row, doing at least 12 hours a day.
The reality is, these long hours are the culture within the professions we have chosen. Even when we have finished for the day, there is always paperwork to be done and then training and study to increase our skills further.
We chose these jobs as we love helping others, today a patient told me I had "made their Christmas". Having a complete stranger tell you that is pretty much the best feeling in the world!
We have dc, it's a logistical challenge. We have an incredible childminder and take turns to pick up/drop off so we can each start early at work. We could just stick to our contracted hours but the NHS is so squeezed that if everyone did this, things just wouldn't get done.