I'm sure the teacher's union was only thinking of the children. (/sarcasm)
Good point, ubut in this case they aren't even thinking of the teachers... this was done voluntarily. They wanted to do this so badly that they were doing it for free... and our beloved unions have stepped in to make sure we don't accidentally get any teaching done.
Defang the stupid teacher's unions. They don't answer to anyone, and only make matters worse. They keep crummy teachers in their jobs, they keep teachers from working hard, they apparently keep teachers from volunteering for extra tutoring, they stifle competition, they take money from teachers to use illegally in election campaigns... (I'll think of ten more in a few minutes)