I see what you mean but totally disagree. Just because they spend more time at school or school functions doesn't automatically translate to merit in my eyes. Also, not all special ed/needs teachers are handling a workload like normal teachers. Some have exceedingly small classrooms depending on the school and/or district they are in. My aunt taught blind and deaf children at Taft for over thirty years so I can see your point in some cases but certainly not all. I've known plenty of crappy bus drivers and coaches in my life. I don't care if they run for the car after the bell rings if they've done their best during regular hours trying to do their job and equaled or exceeded expectations....
Teachers aren't the exception when it comes to government jobs. Pretty much all of them are based solely on experience and education level with little regard for merit/performance concerning pay grade.
http://sde.state.ok.us/Teacher/Salary/default.html
Thats partially true in my opinion. More education to get more of pay takes dedication . Its a different dedication than devoting you heart and sole in the classroom trying to do a good job educating the kids. The former is a selfish dedication. The latter is a selfless dedication. Every kid learns in a different way. A good teacher will impose several different tactics in order to reach all of them. A lazy teacher will use a generic one size fits all approach and not give a damn if all of them get it or not.
The other issue about passing a kid just b/c they are tired of looking at them isnt so true. Teachers are evaluated on what kind of gpa their class has. To see if they are adequately getting their job done. They pass them to keep from being exposed in other words covering their butts.