Can't read the article, pay wall.
But there is a definite dearth of prescribers for psychotropic medication, almost everywhere in the states (big cities to rural communities). This dearth is in response to the managed health care system refusal to appropriately reimburse other forms of mental health care (also, pill popping is much simpler and faster than therapy). Why? Because its expensive, requires more manpower, and is highly varied in treatment course among practitioners. This will not change anytime soon unless something in the field changes. Unfortunately, expense and manpower (there is only so many people a single practitioner could see) are probably not going to change. However, consistent and reliable treatment (even if not more effective, cause medication is not) is something that could change. So, until a patient stops getting 10 different kinds of treatment from 10 different types of practitioners not much will change. I think we need consistent and reliable interventions across mental health settings, but that is just my opinion.