If you want to get pissed about a lack of competition in the pharmacy market then look at the two large PBMs. They set the prices of drugs that every drug store pays. If they choose to raise prices and the insurers don't move in lockstep then you're stuck filling prescriptions at a loss.

Oh, and one of them is owned by CVS.

http://www.npr.org/sections/health-shots/2015/10/22/45060056...