"We agree that if we must have capitalism, that's a better model."

Now there's a question worth sinking your teeth into: Must we have capitalism? I say yes, you say no. Thus, you have shown the downside of capitalism, which one can concede and still say is not enough reason to abandon it. The Democratic socialists like Orwell, King, and Debs have no real place to point to where their concepts work at scale. I'm a democratic capitalist like Hamilton, Jefferson, and Madison. We've got the richest country ever to point to, warts and all.

The Soviet Union is relevant because socialism is unstable; it is always hijacked by thugs, because power always concentrates, whether or not as wealth. At least power based on wealth implies outputs and satisfied demand. Power based on guns gets you Maoism.