Single Payer Health Systems

is a good idea in theory. But the reality is that the US simply doesn't have nearly enough health care workers or the collective mindset for a universal system.
The implementation of a single payer universal system would require the recruitment, training and retention of a large number of new workers who would quite possibly be subjected to a reduced and standardized rate of pay as determined by the system administrators.
And then there is still the prevalent mindset that dominates the conversation, that healthcare in the US is a privilege and not a basic human right.
These are formidable obstacles to the implementation of a single payer universal system.