Yeah, basically, if Barb needed Chris to get a job to support their household, Chris would get a job. He might fuck up a couple of times, but eventually he'd get one.
If things are really bad and he absolutely can't keep a job, something serious would happen. The question would be: would Barb hold Chris accountable or would she hold Chris' boss accountable?
Barb would get into a big fight and possibly get arrested if Chris can't get a job. It would just depend on if she holds Chris responsible or if she holds the boss responsible.
(Though personally, I don't think it'll come to that. I think that with enough pressure, Chris could maintain a fast food job. He just has zero reason to get a job right now.)