Paying for more preventative care, instead of the care required in the ER after the health issue became too serious, should help bring costs down.
People who self selected for free medical care didn't have much better health outcome than others who were not selected, except that they didn't go bankrupt.
So, the group that didn't get paid for didn't go to the ER, while the group that did get paid for went to the ER but didn't have better health outcomes than those that didn't. Surely that says something about the private, for profit institutions that run the ER business.