Not sure why the AHA didn’t fix things like this.
https://en.wikipedia.org/wiki/Health_care_prices_in_the_Unit...
This is the result of a longstanding bargain between unions and employers to provide some compensation as health care rather than salary, which was win-win for both sides until health care costs soared. Now there's no way to break that link without throwing off those negotiations.
The ACA wasn't actually a huge change, except in the sense that any change at all was nearly impossible given the stability of that equilibrium. It's widely agreed that there are many better ways to do it -- all of them dispensing with the link between employers and health care -- but there's no way to get to wide agreement on any one plan.