Because in the very very limited about of time I worked in EMS it was: EMT-B-> AEMT-> Medic->CC-P.
That's not really a fair comparison, because all those titles were education based, not role based. It's no different than saying the role are AS->BS->MS-> PhD; each increase in level is due to external schooling, compared to the job they do. If I'm a hard work, who stays late every day, I am not going to be "promoted" from EMT to AEMT. But If i'm lazy, and don't do what i'm told, I can still go to medic school and go from EMT to medic once i pass my NREMT.
At my college, we have EMS instructor I, II, III, and IV, with each progressive level requiring additional training (usually an additional instructor certification), additional experience, or classes taught or other stuff. clear objectives, achievable goals.
in my corner of quasi corporate america, we have 4 staff roles: "title trainee, title I, title II, Sr. title," substituting title for that particular job, and in theory they are all staff positions who do the same thing, but the higher the title the more experienced the person is at their job. each promotion comes with a pay raise, and a person with more experience can start with a higher title. but it still gives employees something to strive for.
our manager track goes "Team Lead / non-IS manager, IS Manager I, IS Manager II, VP, SVP, EVP, C level executive", with each level rising in the organization.
I know that's why I don't mind staying a few hours extra where I work now, because I know it gets noticed, and come bonus time or promotion time, I know it won't be overthought. From my experience in EMS people wouldn't mind doing the extra 2 hours of paper work if they know it was something that gets noticed, not something that is expected of them.
While that is true, when I worked in EMS, I have stayed late, came in on my off hours, attended meetings, participated in special operations trainings, and helped out when needed, and got absolutely nothing for it. I know of people who will come in on their days off to do work, or help out, and the union guy inside me hates to see that. I don't mind working extra once in a while, when it's crunch time, but the more hours I work, the less I made per hour, and if it's happening on a regular basis, than it's up to management to hire more people to handle the workload.
You're doing it because you know it gets noticed, and you get a return come bonus or promotion time; in EMS, that often translates into you being the sucker who will work for free, and results in you being taken advantage of by managers who play favorites or want to surround themselves with yes men.
In the case of EMS, if I'm spending an extra 2 hours after my shift ends doing paperwork, and it's a result of a poor implementation of the charting system, or a lack of proper relief that would have avoided this issue, than I better get paid for my time. I've spent enough hours helping out the organization that didn't benefit me at all, so now if I'm doing something that will only help the organization, I expect to be compensated appropriately.