There aren't just a ton of anesthesiologist assistant jobs currently listed on job search sites, so this is only based on a few data points and some kind of out of date reporting by the AMA. BLS 2016 numbers don't include average salary for anesthesiologist assistants.
The 150K estimate is probably a little high. It is more likely that you will start at an 80K to 100K salary as an anesthesiologist assistant. One currently available VA position is paying anesthesiologist assistants 56K to 75K per year. Like you said, there is a lot less schooling required. Although the starting salary is a little lower than what you would expect as a pharmacist, you start work so much sooner that, even financially, you may be better off as an anesthesiologist assistant compared to a pharmacist.
Pharmacists typically complete 3 didactic years not 2.
Addendum: For real, stop putting down my profession.
If you post, "I'm really excited about AA school. I'm going to be making 150K per year." I'll give you a thumbs up and move on; however, if your post bags on pharmacy, I'm going to fact check it. If the fact checking is an irritation, switch your approach.