It’s not a columnist’s obligation to prove every statement. It’s his/her job to make rational points and if you have proof they are wrong, then you get to comment. Your lengthy reply is nothing more than repeating theories that often don’t match how things work in the real world.
That’s the problem. You’re full of theories which work to some extent, some of the time and you’re relying on them to work perfectly all of the time, and when they’re challenged you repeat more theories.
The communist is never going to compare the results of his political religion to the operation of a communist economy and admit that they doesn’t work. There are many examples in the American economy of the “market will fix every business abuse without legislation” theory not working and the “market will result in the lowest prices” not working.
You and the communists are free to stick to you theories. I’m happy pointing out real-world situation where they don’t match how real people actually work.