I'm on a pain pump and I have no idea if it's even relevant, but let me point out that it does not place opiated in your blood strewn and should not have any interaction with your addictive behavioral issues. It only dispenses micrograms of medication directly into your spinal fluid allowing the opiads to find the necoceptors (pain receivers) directly.
It also is programmed and controlled by your doctor so you can't abuse your meds by hoarding etc.
Drug abuse is probably the last reason they would consider going to a pain pump, but I can see a lot of benefits if the modality fits your prognosis.
I'm sure there's a lot of hurdles you would have to clear, but this may be a way for you to get opiad pain relief without all the destructive side effects.
Because the opiads are injected directly in to the cerebrospinal fluid you don't get the addictive side effects and you don't get any opiads in your bloodstream or your renal system. This saves your kidneys and liver!
The amount of analgesic is 100th-500th the amount used when taken orally.
Aggressively lowering my pain meds gives me minor flu like symptoms...including the runs as my digestive system comes out of the constipation effects from meds and I get thing swing the other way until my body normalizes.
Hang in there. I just did as little as possible as I felt like I had the flu.