Sometimes referred to as “Medicare for all,” single-payer care is set up to cover all residents of a state or nation equally. It is paid for by a single public or quasi-public agency, typically through the collection of taxes, and overseen by that agency.
Some systems incorporate contributions from employers, or from individuals in the same way Medicare recipients pay a monthly fee based on income. Patients usually continue to get care from private medical providers. But insurance through employers becomes unnecessary. The government takes over.