It's pretty well established that the problem is one of distribution rather than sheer numbers. Nobody seems to have figured out how to solve it, however. Undesirable parts of the country are undesirable to pretty much everyone (e.g., doctors, mid-levels, etc.) for the same reasons. Even money won't change that.
That being said, the article seems overly optimistic, blithely dismissing every argument for a looming workforce crisis with no actual data to back it up aside from pie-in-the-sky estimates.
As far as efficiency goes, I'm all for allowing physicians to bill (and be reimbursed) for non-face-to-face encounters such as "virtual visits," but I vehemently disagree with this paragraph: "Health services that do not require a physician—such as annual wellness examinations, follow-up visits, closing of care gaps, and support for medication adherence—could be provided by nurse practitioners, care coordinators, and medical assistants." The author's bias is showing (Ezekiel Emanuel is the chief architect of the ACA).
