I had a patient that more or less couldn't do anything either. She'd go to do a load of laundry and drop something and would have to pause to consider whether she should pick up what she dropped or whether she should just leave it and let someone else pick it up because of the amount of pain she was in.
Her life is completely better now and she is able to work again and to enjoy life. Not knowing a thing about what your wife is going through, I'm going to guess that her source of pain is most likely mechanical in nature and that her body is out of alignment both soft tissue and her bones but nothing is damaged so nothing shows up on MRIs or x-rays or any other tests.
The closest you can get to replicating my treatment would be to get a series of full body massages and chiropractic adjustments in a single day. Without having seen her myself, I'm fairly confident that her body is most likely lost and can't find it's way back to it's neutral state.
The problem with most massages is that they are more or less blind. The massage therapist can palpate for tension, but doesn't really know a way to test to see what the body needs. The problem with a chiropractic visit is that it is more or less over way too early. Most chiropractic visits will only touch upon the surface of what needs to be treated.
There is hope for her, but it doesn't come in a bottle or syringe and there most likely is no need to cut her open. Please try out some alternative forms of treatment. Western medicine so far has gotten her no where.