This is not an area of expertise for me, but a few points: 1) One of the parts of Medicaid has been analyzed, and the health statistics are no better for recipients than no insurance at all; 2) The VA, while in my experience able to offer under certain circumstances very good and responsive care, is unable to provide any semblance of quality care for certain types (think head trauma).
I do believe that as a nation it is time for us to move towards providing health care for all, and with our amazingly wasteful and inefficient current modes of delivery, there should be resources available to do so, especially if we move in a incremental, thoughtful way. Medicare for all sounds great, easy and simple, but with massive inefficiencies and unintended consequences, not to mention top down and reinforcing the bureaucracies and entrenched political power in ways that are undemocratic and downright economically irrational.
To close, I paraphrase the Wall Street Journal, who in a recent editorial made the assertion that they wished the whole medical enterprise would fail just to destroy the insurance companies (this was an ellipsis, a pox on both your houses kind of cri de coeur). The insurance companies do not appear to this capitalist to be helpful in solving health care.
