When you send your child to a Catholic school, what do you expect?
Chances are, among the other essentials of education, you expect that the individual instructing your child will be faithful to the Catholic Church's teachings and her Magisterium (teaching authority). It is Catholic education you are seeking, right?
These days, though, it's hard to tell what you'll actually get. Look no further than the many catechetical horror stories of Catholic education in the 70s and 80s.
So it's easy to cheer the example of Bishop Robert Vasa, who put his diocesan teacher contract where his authority is.