I accept as you say, that the cost savings will be minimal.

Two school systems provide choice. For instance, there are some special needs that the Catholic school board satisfies far better than the public school board, and vice versa.  So, I'd like to maintain two school boards, but I must say, it is inappropriate that there be a religious divide. My family has a choice of two schools, but the neighbors next-door do not. That's unfair.