Incidentally, I have no problem with philosophical arguments, and in fact, consider philosophy (real philosophy, as opposed to academic fog farting) a critical part of thinking. The problems come when philosophy becomes disconnected from reality, and you have the political and ethical version of phlogiston chemistry, or epicyclics for planets.

The main point for me on Marxism is that, given the universally consistent history of the movement over a century, at this point anyone who comes up and proposes running a nation on Marxism should be tarred and feathered, not welcomed as a Hero of the People. I don't think reading the works of Marx would significantly change this opinion.

I'm not going to go into all the details, but the short version is that true Marxism, as visualized, not only doesn't work, but can't work. Not on human beings.

"Relativistic" economics is no more part of the real world than relativism in physics is part of the everyday world of engineering, structural design, and normal Newtonian physics. It may, as you say, have useful applications for professional economists studying the entire range of economic thought, just as relativisitic physics is critical in some fields like astronomy and others. But if you want to have a real-world economy that works? Look around. What works?

I would have no problems with reasonable government interference with the free market under some circumstances, but if you listen to the Left, there is never enough. There is never a point where they say, "This is plenty of regulation." None of them ever say, "You know what? I think the market can handle this particular situation." More laws, more controls, more regulations. Always. Socialism? Feh. Why bother to own the means of production when you have total control over how its run? The inevitable ratchet is toward complete central control of the economy, and I would prefer this doesn't happen.

In the discussions about things like intelligence gathering, many people were not sure about all the details, but preferred to err on the side of privacy and individual rights.

If you want my position in a nutshell, in cases of economic activity, I prefer to err on the side of economic freedom and individual rights.