utter bilge
It's not slander, it's a hypothethis based upon the demonstrable fact that it is nearly impossible to fire a member of the teacher's union. You can weep and whine about conjectured injustices throught the past but the fact is that today the litigious environment created by those cited bodies has created a situation where folks who should be replaced cannot be replaced because administrators and school boards fear the cost and consequences of lawsuits.