It’s called common sense and fifty years experience working with employees and their health benefits and working with doctors and health plans.
M4A as proposed by Sen Sanders and Rep. Jayapal significantly increases the covered benefits for all Americans, including those with good employer coverage. It also raises benefits for seniors, the most expensive group today.
In addition, it removes all forms of point of service cost sharing while opening access to millions of individuals without coverage today. And, based on the rhetoric, there will be no interference by a third party to access or type of care.
It also creates a massive new federal bureaucracy out of necessity. The savings are assumed from two major areas; paying lower fees to health care providers including for prescriptions and lower administrative costs.
Put it all together and costs may be spread differently across all Americans, but they cannot possibly be lower in total and they can’t be controlled in future years without significant consequences which are currently ignored by proponents and supporters.
It’s common sense.
No other country has such a system and every other country with a universal system applies controls of different types and still struggles with costs.