Best resource to learn about US healthcare problems/MD shortages

My friend and I got into a heated debate today about this and (yes I know there are lots of threads on here already) but does anyone have a good source like a long article or even a contemporary nonfiction book that honestly and objectively distills the complicated landscape of healthcare in the US? Long answer short, an advisor simply put the MD shortage as a by product of Congress not releasing funds for residency funding, which is where the bottleneck is. Is that an accurate description?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Pre-Medical - MD Source Type: forums