Pain docs do indeed make much more than anesthesiologists, typically.
When you do procedures, you can take your cases to a surgery center and become a partner in that surgery center - big money.
Also you can become a partner in an ortho group who feeds you referrals,. You keep the post-op patients happy with opiates, you do injections on some, you split a share of the ortho/neuro group profit - big money.
Problem is you have to be OK doing those things - I was not.
Since I have left I have had offers to come back to pain for "7 figures" - no thanks.
Also, the schedule in anesthesia IMO is better. Sure no overnights or in-house call in pain, but its every single day until 5-7pm by the time consults and paperwork are over. That daily grind can get old, especially when you mix in a couple dinner meetings during the week.
I remember sometimes I would have to go out to these networking dinners until 10-11pm. Then have to go home and sleep and wake up and work until 7pm the next day. Id rather sleep in the hospital and be off post call at that point.