I just want to add into the fray that not in all systems do doctors derive any financial benefit from prescribing. It's unfair to tar them all with the same brush. Not all health care systems work on a for profit basis.

Where I am the doctor gets a flat fee from the government per service (ie psychotherapy). And the drug I was prescribed (which is just for occasional use and is not an SSRI) is a generic that cost 5 dollars for 15 pills.

Right now I'm mainly be treated with psychotherapy. But I can see the usefulness of drugs in getting some people to the point where psychotherapy could help (ie if you are too anxious to handle psychotherapy you might need some medication to be able to get there and then start dealing with things).