Gain comes in forms other than cash. How about he gets to have control over another human life and play God, then marry his long-term paramour after his wife is starved and dehydrated to death.
Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh.
What is it about adultery don't you understand ? Does adultery include the concept of "cleaving to his wife", or did he break his vows ? Wait, maybe that's called polygamy - you marry one and have a common law one... nice double standard there.
Terri told her husband that she didn't want to be kept alive. Genesis 2:23:
Right after she was declared PVS, he said he'd care for her for the rest of her life - no declaration of her wish to die under such circumstances surfaced until years later. After 7 years and several children with another woman later, he suddenly declares she wouldn't want to be kept alive. Why would you suddenly believe him after 7 years of saying the exact opposite ? He suddenly had a flashback that so conveniently released him from his obligations towards her ?
You didn't answer my question - if you became vegetative, you had no written directive and had not expressed an opinion to anyone other than your wife, and your wife was living with and had children with another man - you would want your wife to be able to starve and dehydrate you ? You think her judgement, under those circumstances, would be all about your best interest ?
If she settled down with him years after trying and failing to have my tube pulled, then yes.