This is why it doesn't happen: politicians get bought.
"Jeffries co-sponsored Medicare for All legislation between 2013 and 2021, but in August 2026, he stated he shifted his stance and stated that he no longer supports or co-sponsors the proposal." https://en.wikipedia.org/wiki/Hakeem_Jeffries#Healthcare
"Jeffries co-sponsored Medicare for All legislation between 2013 and 2021, but in August 2026, he stated he shifted his stance and stated that he no longer supports or co-sponsors the proposal." https://en.wikipedia.org/wiki/Hakeem_Jeffries#Healthcare