The distinction between liberal and conservative political labeling in america is entirely cultural. There is precisely zero ideological, ie political-economic, difference. It's just culture wars all the way down while we get pickpocketed together.
I see what you mean, but I'd disagree with the idea that there's “precisely zero ideological, ie political-economic, difference”.
That's true that since at least Clinton, the Democrats as a political party have mostly embraced the business-friendly view that is also the conservatives' position on the subject.
But the Democrat's leadership are only a (very) imperfect mirror of their electorate and of the intellectual left, and there is definitely a significant set of left-wing economists (Polanyi, Stiglitz, Piketti to name a few of the most prominent, in chronological order).
You can't look at Cochrane and Piketti and say there's no progressive vs conservatives divide in economics.
I was being deliberately facetious, I suppose, but because of our campaign finance problems any policy of major economic import has coordinated bipartisan pressure.