"This is a disaster," Mark Miller, the Wisconsin Senate Democratic leader, said in February after Republican Gov. Scott Walker proposed a budget bill that would curtail the collective-bargaining powers of some public employees. Miller predicted catastrophe if the bill were to become law -- a charge repeated thousands of times by his fellow Democrats, union officials and protesters in the streets. Now the bill is law, and we have some early evidence of how it is working. And for one beleaguered Wisconsin school district, it's a godsend, not a disaster. The Kaukauna Area School District, in the Fox River Valley...