A new study has found that Medicare for All would save over 100,000 lives in the U.S. per year while also reducing Americans’ health care spending by more than $1 trillion annually. Yale University and University of Maryland researchers have estimated that the universal single payer health care system introduced in the Medicare for All Act would prevent 114,000 deaths per year.
A more efficient economy is generally beneficial for billionaires and/or corporations. The majority of the world economy has universal health care (in some shape or form), billionaires and corporations are doing just fine. For example, Switzerland and Sweden have more USD billionaires per capita than the US.
The primary reason the US doesn’t have universal health care is because bribery is legalized and those in whose interests it is to maintain the system - not the rich in general, but specific corporations - have stopped efforts to reform the system.
A secondary reason is that some GOP (and to a lesser degree Democratic Party) donors, in whose interests it would be to implement universal health care, have funded efforts to stop it because they are stupid and/or evil.