I think that suggests that satisfaction is quite strongly linked to status and empowerment. It is quite interesting reading through this how much classroom teachers feel under resourced and disempowered.
I have to say I am inclined to think quite a lot of SLT exaggerate their hours (at least in the sector I know of). We have a large SLT and I would not say that most of them work significantly more hours than a lot of teachers. We do have one who arrives at the crack of dawn but most of the arrive around 7.45 - 8 am. They might well not leave on any given day til about 5.30 ( and a few of them later but only under quite specific circumstances that tend to affect lots of staff eg parents' evenings) but they have negligible planning, marking and teaching. I think my satisfaction would be higher if I only had a couple of classes to teach! The meetings they have with parents can be fraught but they don't need to do them in their lunch time of their one precious free and they also have a real sense of team , and occasionally get to meet bigwigs. They also tend to get direct praise (albeit also direct criticism) and lots of direct credit, which is also satisfying. They also praise each other and support each other. I do hope SLTs read this and acknowledged and accept the work they have to do in making teachers feel valued and supported, without increasing admin.
Agree that breaking this down unto different age phases more fully would be very interesting, although a few comments do pinpoint significant differences.