Let them walk. It will do the schools some good to see that not every bargain is a value. Sure, the schools can fill every desk in a blink. But putting an avrech in front of a class of 20 smart-alecky 11 year olds is a class uproar waiting to happen. Many rebbeim ARE worth what they get paid.
But when all is said and done, this is a sad day for torah.. regardless what the outcome