What are teachers worth?

There's been a lot of talk lately about the value of teachers with what is going on in Wisconsin (they're trying to take away collective bargaining for government workers, including teachers). Regardless of what I feel about that situation, we all know that teachers are not paid well. I found this note on Facebook that I just had to share with you. Read the whole thing. After you read it, tell me what you think? What should teachers be paid?