College professors are tenured, not unionized. And considering that most schools hire adjunct professors and slash benefits to the bone, it's hard to argue that teachers are bleeding the system dry.
On the other hand, the school where I just got my Master's from just built a brand new 177,000 square foot rec center, complete with 3 story climbing wall. And we've proudly paid good money to bring the guy/girl who invented Zumba to teach a few Zumba sessions. On top of this, programs that bring recognition to "joe consumer" (college football, basketball, etc) want for not.
Also, much of PBS is not unionized. It's kind of hard to unionize organizations that rely on member donations to keep afloat.