Blood from a stone is the saying.
Honestly once I saw the date moved up to the 3rd, i knew it was likely because the is no case to be had. Chris effectively doesn't have an income. And because of his ability to essentially be the Teflontard, this gives him more reason to not get an actual job.
But don't be mistaken, he still owes the money, and I'm sure it's accruing interest at a fantastic rate because he is likely going to miss his minimums.
If Barb actually wanted to really do something for Chris before she passes; she'd find a way to take on his comically small amount of debt. I wouldn't even be annoyed by Chris missing out on more responsibility... its probably the least she could do for allowing him to run fucking wild since Bob passed.