That's their point. Congress isn't going to get $10 million from providing universal healthcare (at least for any system that is any good), so they have no incentive to pass it. The year the ACA passed, Democrats suffered one of the worst legislative defeats in history. Nobody wants to be the person to tell millions of people that they can no longer see their chiropractor for free or that their healthcare is not longer paying thousands of dollars a month for weight loss medications.

https://en.wikipedia.org/wiki/2010_United_States_elections

There’s a disconnect between what people say they want, and what people actually want.

People say they don’t like the ACA. But if you try to revoke its grants, it’s political suicide. Which is why republicans don’t even try.

Bring back denying insurance for pre-existing conditions? Lower the age for parent-child plans? Can you even grasp just how wildly unpopular either of those would be? Or what about marketplace plans? Congratulations, you’ve just destroyed every small business and entrepreneur in the country. I’m sure that will go over well.

The ACA is universally loved. Yes, everyone likes it. They won’t say that because they don’t know exactly what it gave them, and they’ve taken it for granted. Many of you would be uninsurable without the ACA.

And that’s why, despite people complaining, the republicans do not dare repeal even parts of the ACA. It’s too popular, whether people know it or not.

I suspect a single payer system would be equivalent. It would be contested hard, but once it’s passed, it’s passed. It would become so unbelievably popular for a majority of the population that suggesting a repeal would immediately end your political career.