Why do the kids have so much vacation from school? And don’t tell me the teachers need the time off to clean and cook. Women who work at non-teaching jobs work until the last minute. What gives?
The main perk of the “Klei Kodesh” job is that it follows the Yom Tov schedule (and school, so you get both Yom Tov & summers), as well as being home for your children when they get home from school. It is like a union job (nothing against you, SJS), where certain perks are the reasons why people take the job over other possible venues, even if the pay is much less.
Teaching is meant to be a “cushy” job; it is not meant to be working in the “real world” (whether the actual job is difficult or not is irrelevent). Even if you paid the teachers extra, they would not want to come in, and many would quit if they had to work real hours.
So to a certain extent it is a win-win. Teachers get their hours, and schools pay them Bupkis.