I agree that benzos are a godsend for those with anxiety. I also think they're extremely helpful for opiate withdrawal. They help with anxiety, insomnia, the RLS and leg / muscle cramps.
I just wish more doctors were willing to script benzos to opiate addicts in withdrawal. Just because a person abuses one class of drugs doesn't necessarily mean they're going to abuse another.
Plus, I really don't think a person is going to develop a problem with a week or two's worth of scripted benzos. The patient isn't asking to be kept on them. If they can successfully get over the opiate w/d, why not help them do it as easily as possible.
As for benzos as a DOC, I can see the problems. After a while, there really is no significant "high" from them, especially longer-acting benzos.
Increasing the dose is only going to increase the side-effects (somnolence, blackouts, sloppy behavior, unintended consequences). Plus, benzos have a horrible physical w/d. Anything that can cause seizures in w/d should be avoided if possible.