There is no solution being proposed because most people don’t understand the problem, and of the few who do, about half of them helped to create it or support policies that will only worsen it.
What is being described as a capacity or boarding problem is really nothing more than a revenue and expense problem. That is to say, a series of policies were implemented about a decade ago that significantly decreased hospital revenues (i.e. Medicare cuts, shifting patients from private insurance to Medicaid or making them functionally uninsured with high out of pocket plans, etc.) and increased expenses (EMR, CMS compliance, etc.). The result was that hospitals that were operating on narrow margins of 3-5% were cut to the red and had to reduce services (ie beds), consolidate to spread expenses, or simply close. Crowding in the ED is simply a byproduct of what happens when hospitals cut expenses and divert resources to revenue generating service lines such as ortho, CV surgery, etc. so that they can stay afloat.
The only way to fix that is to inject liquidity or reduce expenses within the system. I have no reason to believe that those who want to provide “free” healthcare to everyone have the understanding of basic economics to make a positive impact. Everything else is a fart in a hurricane.