Well... yes, the CBO, et al. did forecast a savings in the total cost of health care with a medicare for all...
1. Savings in administration of the program, but didn't project an increase in Federal employees that would be needed.
2. Reduced payments to providers... doctors have already been priced out of the market... the nurse-practitioner you see today will be replaced by a nurse's aide.
3. Those expensive long term illness will have to been eliminated or rationed... even today's Medicare's book of illnesses is getting thinner...
4. Improper payments and FWA cost ignored...
And there you are... savings hundreds of billions...
but, then they've tried.
Your daily reminder that Medicare for All would save $650 billion and 68,000 lives each and every year, per CBO and the Yale School of Public Health.