Doctor Chrusher was purchasing from a non-Federal shop. Hardly the same.
You have no evidence that the shop was "non-Federal" -- none whatsoever, much like many of your other points. You're simply making supposition after supposition which you are cherry picking in an attempt to justify your positions.
Only if you consider genocide and conquest "technology". If someone would come to your house and steal all your hard-earned money, would you argue that Capitalism is unworkable?
LOL Not even close to being parallel. That's quite a stretch there. However, you yourself brought up firearms -- hence, technology. But the technology I refer to are things like tractors, backhoes, adequate plumbing, roads, aquaducts, and other little things that are needed to boost the output of farmland.
It worked until people with a bigger stick come a stole their stuff leaving them in hunger. Hardly their fault. Or are you arguing that conquerors' societies were inherently superior to the conquered, and not just an accident of geographical positions and resources?
Not arguing anything, except no one "stole their stuff" in most of the world where hunger runs rampant. They simply don't have the aforementioned technology needed to increase food output.
It's not "interesting", no more than noticing that small boys are more likely to be bullied in school.
Ah, so you think of yourself as a defender of the oppressed... To you, capitalism must be inherently evil.
You argued that sharing knowledge is human nature while sharing stuff is not. I demonstrated that it's not the case.
Uh, no, you haven't. You claim it's not, but sharing knowledge is in human nature because it increases your stature in the community with whom you are sharing. Your own casual dismissal of my family's charities clearly demonstrates that sharing goods does nothing to increase one's stature with you.
And I see people operating a different economic system which is not fully explained.
Because it's made up.
Star Trek also pay "lip service" to science when talking about its technological marvels, but it doesn't explain how they works.
As a matter of fact, Modern Trek which has TWO instances where there's a suggestion that there's no "currency" (big difference between no currency and no credits) has gone to great lengths to explain everything from how the warp drive works to how the transporters operate. Yet two throwaway lines in Modern Trek are the grounds folks use to justify the "there is no money" nonsense. Sorry, plenty of other examples where it's clear there is a banking system. Upthread, someone reminded us of the Bolian banks. They're clearly Federation members, and they have banks.
I always find it funny that people readily accept warp drive, transporters, alien lifeforms and space amoebae but God forbids if anyone mention an economic system that it's not unlimited capitalism.
Willing suspension of disbelief is a tricky thing, but your assault on "unlimited capitalism" is old news.
Which, again, has nothing to do with the issue at hand.
Which issue? We're discussing the existence of Money in TOS.
You claimed that hungry think about food less than those who are well-fed.
No, I didn't. You really need to read more carefully. I have found that people who are OVER-FED (i.e. those guilt of Gluttony) are generally overly obsessed with food. They think about it constantly, and sooner or later, they die from their overindulgence in gorging themselves. I lost my uncle to this very condition--he was a glutton from the day he got out of the service. I even saw him one time dip a stick of butter into confectionary sugar and eat it like some sort of lollypop. He was obsessed with food, eating constantly. We all know people like this, so obsessed with food and eating that they are no longer productive members of society. It killed him, and it will kill them. I put it to you that folks like these are far more obsessed with food than those afflicted by hunger. If you can't accept that, then that's your opinion.
I argued it was clearly ridiculous.
No, you CLAIMED it was clearly ridiculous. You've offered no scientific study, no proof of your claim. You've come nowhere near to dismissing my point above.
Really, you have an habit of throwing around weird claims and then forgetting what you were talking about.
Oh, please, if you can't keep up, hop off the trolley.
That even in Modern Trek, there's for more evidence that that system is in still in place despite the protestations of a few?
There are just as much evidences of the contrary. The issue is that you accept the ones that point to a monetary economy at face value, while claiming that evidences of the contrary are just "lips services". I am more interested in conjuring a system that would make both sides correct. There are some interesting ideas around. But it seems you are more interested in having your own vision enshrined in stone.

Right... Where did I come out and claim "ENSHRINE MY WORDS IN STONE" you silly, silly person? This snide remark just serves to deflate any respect your argumentation might engender. You're not here to debate; you're here to ridicule, and that's not worth my time or effort.