This whole thread reminds me of a joke:
A lawyer and doctor are sitting together by a wedding and everyone keeps coming over to the doctor and asking about this ache and pain, and that issue etc.
The doctor turns to the lawyer at some point, and asks, "Why is no one coming over to you?"
The lawyer replies, "They used to, but I would have my secretary send them a bill the next morning, and people stopped coming over for the "free" advice."
The doctor loves the idea and the next morning he tells his billing secretary to bill so-and-so's insurance, and send them a bill for the co-pay etc etc. The doctor is so excited about his new way of doing things, that he himself starts checking the mail to see people's responses.
A few days later he gets a letter in the mail from the lawyer.
Its a bill for services rendered.