Tuition discounts
Why do called workers' children get such a break on tuition both in grade school, high schools, etc.? There are many instances where the spouse works and together make a very nice salary, more than members paying full tuition.
That is really a question you would want to ask of administrative personnel at schools where such discounts exist. (As a called worker, I never was the beneficiary of discounted tuition for my children.)
I imagine that if churches and schools designed a tuition break for their called workers, it was in consideration of the called workers’ salary only. Employment and accompanying salary on the part of called workers’ spouses is an entirely separate matter.
Perhaps a tuition break like you mentioned represents the attitude of a congregation giving “double honor” to its called workers (1 Timothy 5:17). If that is the case, neither you nor I want to begrudge that.