How could we have capitalism without having figured out that capitalism works?
Because we did, for a long time and in many places. You don’t need to understand a single thing about economics, other than that scarcity exists, in order to have a legal system; and the logic of law is not dependent (nor did it depend upon) any praxeological formulations or understanding of marginal utility. An understanding of capitalism post-dates capitalism by centuries.
It wasn’t until half a century ago that humanity figured out that price controls don’t work.
So what? It’s made no different and they do it anyways. And most of ‘humanity’ doesn’t understand this for piss. If we had the actual historic legal norms in place instead of fiat law this would be irrelevant, and with fiat law in place it is still irrelevant. You don’t need any understanding of the business cycle to prevent business cycles. You just need to understand that fiat law is nonsense and government is a myth. None of that requires you to read one page of Menger.
And Mises figured out that socialism can’t work in 1919.
And if it wasn’t for the BS statist system that had overtaken people there would have been no need for him to develop the theory of economic calculation; and after he did it made…no difference. States don’t care, and voluntary socialists discover damn quickly that it doesn’t work.
If economics, as a science, hadn’t figured these things out, we wouldn’t even know what policies to implement.
‘Policy’ is crap, and useless; and the government couldn’t give a damn what economics, as a science, has figured out. They care about status, power and money.
And economic policy matters more than anything else, it’s the difference between Nigeria and Manhattan.
No, a customary legal tradition is the difference between Nigeria and Manhattan; and Manhattan is about two steps away from a socialist police state anyways. A knowledge economics has nothing to do with it, a historical accident does. Every time the government passes a law or makes a decision it gets it wrong. The only good ‘policy’ is no policy, the only good number of police is zero, the only good ruling is one that doesn’t get made in government courts.
I agree that macroeconomics as a subject is pretty useless. You can work for the state or a think tank, but that’s about it.
Macroeconomics, for the most part, is just baloney the econ-priests come up with to glorify their Great God Leviathan.