I agree with Capslock. It is a tragic situation no matter how you look at it. But personally I agree with taking the feeding tube out and letting her die. Human euthanasia would be the best solution but unfortunately that is not an option. It SHOULD be. We take better care of and show more empathy to our pets in that situation than we do our human loved ones.
It is always going to be terribly painful to lose someone we love no matter how it happens...fast or slow. But she made her wishes known to her husband as well as a few others. He is trying to carry out her wishes. Her parents are trying to cling to her...not wanting to let her go. But they are not honoring HER wishes. I don't think her husband wants money. I think he wants his wife to have the peace she asked for. There may be greater things waiting for her if she could be free of her physical body to move on.
I do not ever want to be in that situation. I have told everybody I know that I never want to be put on life support permanently. When there is NO chance to have what constitutes a decent life...let me go! Why sustain a physical body when there is no mind to go with it? That's not "life" to me.
Its holding you captive in a world that's between living and dying. Maybe one day we will advance enough to allow ourselves to choose life or death in situations of PVS or excrutiating terminal illness.