You don't need a better theory for the purpose of the discussion.
What you can do - as one example - is take the results of what you know to be flawed not so seriously and when making decisions built-in more leeway for errors and corrections, and strengthen the human side. Incidentally, that is actually very capitalist/liberalist: Give more power away from centers to the root, the local people to make their own decisions, overriding what theory prescribes.
For a concrete tiny example, when I tried to return something at a department store the employee was very afraid to do anything not by the book. She was continuously being watched by cameras too. If she had had the power to actually make decisions it would be much better. Sure, people make mistakes, but I question the solution of making people into programmed "by the rules" drones with no ability to react to local events and use their own brains (if an AI would do that everybody would be gleaming, "look how intelligent our AI is!" - even when the results are far worse than that of even a below-median IQ human brain).
The point is what can change is what you do when you find that your theory is not good enough, and I'd say there are plenty of things to do even if you don't have a better theory (now or ever).
Yeah, and because basically all of mainstream economics has VERY strong ideology built into its foundational assumptions, and its practitioners enjoy a great deal of (largely undeserved) respect and often great power (unlike other more truly scientific fields), the odds that a mainstream economist would look at the failure of their theories and conclude "wow, everything we've been doing is deeply flawed at best" is low. Good luck getting a mainstream economist to dig deeply and take a critical look at the fundamental contradictions within capitalism.
What you can do - as one example - is take the results of what you know to be flawed not so seriously and when making decisions built-in more leeway for errors and corrections, and strengthen the human side. Incidentally, that is actually very capitalist/liberalist: Give more power away from centers to the root, the local people to make their own decisions, overriding what theory prescribes.
For a concrete tiny example, when I tried to return something at a department store the employee was very afraid to do anything not by the book. She was continuously being watched by cameras too. If she had had the power to actually make decisions it would be much better. Sure, people make mistakes, but I question the solution of making people into programmed "by the rules" drones with no ability to react to local events and use their own brains (if an AI would do that everybody would be gleaming, "look how intelligent our AI is!" - even when the results are far worse than that of even a below-median IQ human brain).
The point is what can change is what you do when you find that your theory is not good enough, and I'd say there are plenty of things to do even if you don't have a better theory (now or ever).