How can I get the shop worker's luxuries need met?

The only method I have found to satisfy the "luxuries" need for inmates is via a shop. My problem is that the inmate who works there is one of the biggest troublemakers because his luxuries need is never met, because he can never buy stuff from his own shop! Below is the screen capture of what I'm talking about. Every need met, except for Luxuries. Anyone have any idea how I can fix this? I tried firing all of the inmates, and re-hiring people in the shop, but this same guy keeps coming back to work.

Edit: I guess if I had a name like that, I'd be angry most of the time too though.

You need to engineer a situation where your malcontent is indisposed and another prisoner claims the job first. The game is not great at micromanaging like this, so creativity is required.

Prisoners claim a job at the beginning of a work timeslot, then start pathing to it to start work. The reason removing the position and reopening it doesn't work is because your malcontent is still around to reserve the slot.

I see two possibilities:

• Punish your malcontent (call it "bad customer service", likely it's true). If he's locked in his cell or solitary, he can't start work. Time it so that he's locked up at start of shift, and gets released while someone else is working the store. So long as he doesn't immediately claim some other job, he should treat the workshift as freetime and resolve his need accordingly.
• Set up a second backup store. If your malcontent is manning the first store, he can't claim the job at the second. You can then force him out of the first store by removing his position. Then he can resolve his need at the second store.

This is all presuming there aren't any other problems, like lack of anyone else qualified, your prisoner shanking the new store keep, etc.

Contraband luxuries would also satisfy the need, but obviously the less of that you have the better. I've also seen mention that if cell grading is enabled, higher quality cells will satisfy this need, but as far as I can tell, cell grading only affects behavior and probability for misbehaving, not any of the needs.