Wait a minute. He is soon to be a "missing father", just because of his own refusal to take responsibility. The only thing I see different from the usual case, is that the wife has had to pay for his expenses too!
You should be just as "angry" as I am. Is his wife's anger similarly missplaced? I'll bet his fatherinlaw is none to pleased with him either.
I went through a (slightly) similar situation. I'm female. Married but no kids. I was unemployed and sat at the video game console for hours on end. No housework got done. Hubby was furious when he'd come home from the road (trucking) and I would be a slob in a trashed house. Well, guess what? I went to the doctor and found out that I was mildly depressed. He also told me that the "escapism" of video games actually makes depression worse. I didn't have to give it up but limited games to weekends. I also went out and found a job.
The house is still messy, but I work 6 days a week, so what the hey.
BTW, I told Gen that if he was willing to work, I'd put in a word for him. That puts the ball in his court. His chance to prove that he can "walk the walk".