If you’re following the health care debate, you’ve already heard quite a bit about “Medicare for all,” the proposal to improve and expand Medicare, the government health insurance program for older adults and people with disabilities, to all Americans. As proposed by Sen. Bernie Sanders (I-Vt.) and others, Medicare for all provides all Americans the right to use physicians and hospitals of their choice anywhere in the country, eliminates premiums, deductibles and co-payments, and is projected to drive down national health care spending by $2 trillion to $5 trillion over the next 10 years.