> I think this is slightly wrong in the other direction. How does people doing things "for the love of the craft" inherently lead to better quality "stuff"?

You're correct that a passionate hobby does not necessarily translate to higher quality output. These sorts of discussions are handwavy by nature because the truth is never black and white. In fact, I can easily provide an example that contradicts my own assertion that there would be "less stuff" in a socialists/Marxists environment: Wikipedia. Before Wikipedia, when I wanted a digital encyclopedia, I purchased software from Encyclopedia Britannica. The nice thing about their encyclopedia was the articles were high quality, vetted by experts. The problem is the number of articles was limited, updates and additions were infrequent, and it cost money. By comparison, Wikipedia has a massive number of articles, frequent updates, and is freely provided by a non-profit foundation. Unfortunately, it doesn't have the same vetting as Encyclopedia Britannica and so the quality is inconsistent. So here the "socialists" Wikipedia offers consumers more "stuff" to read, albeit with inconsistent quality, than the "capitalists" Encyclopedia Britannica.

> I also might point to the people who are so well liked and famous that they basically can "write their own ticket" - George RR Martin is an example. His first few books were considered amazing, but it's also considered that given no real impetus anymore - he's unlikely to finish the saga ever. As a whole then, is an unfinished saga really "higher quality" than one finished to make a buck? The answer IMHO isn't obvious.

Why did George RR Martin lose his passion?
Was he only after fortunate and fame?
Did the dopamine hit he received from said fame outweigh the hit he received writing books?
Questions like this are far more revealing because they touch on a deeper truth.

> There are plenty of examples of people doing things already "for the love of the craft" either because they're wealthy, or at least doing well enough for it to be a serious hobby.

What makes someone a natural builder? Why aren't there more engineers like Ton Roosendaal who, when asked why he gave his creation away for free, is quoted as saying "Money doesn't mean anything. It's not interesting. I call myself a maker; I want to make stuff." Why aren't more physicians like Dr. Frederick Banting who, after discovering insulin, sold the patent for $1 because he believed "insulin does not belong to me, it belongs to the world."

Human nature can be less-than-stellar and economic systems like capitalism attempt to channel it into something constructive.
Is this channeling necessary and at what point does it become counterproductive?

Humans are a product of their environment and experiences. On this very board many folks idolize CEO's...but why CEO's and not folks like Ton Roosendaal and Dr. Banting? I think the real truth, the deeper truth, is the "revolution" starts with the culture itself: rather than TV shows like Shark Tank lets have programs emphasizing non-profit founders, rather than hero worshipping CEO's, let's encourage emulating folks like Ton Roosendaal and Dr. Banting, then...maybe...capitalism will fade away on its own.