A recent study reported in the PLOS Journal illustrated the benefits of a single-payer system with respects to healthcare costs.  The researchers conducted 22 different reviews and concluded that the cost savings benefits were undeniable and that implementing a single-payer system here in the United States would improve healthcare and save money. 

How a Single-Payer Healthcare System Could Save Money in a Year healthline.com

Projected Costs of Single-Payer Healthcare Financing in the United States: A Systematic Review of Economic Analyses This study was conducted by Christopher Cai , Jackson Runte, Isabel Ostrer, Kacey Berry, Ninez Ponce, Michael Rodriguez, Stefano Bertozzi, Justin S. White, James G. Kahn, PLOS