That's a fair point. Still, even in the TOS era they obviously had "food synthesizers" aboard ship, and apparently handled uniforms similarly. The implications of transporter tech were obvious, and many things (e.g., the colony worlds) only make sense with at least industrial (if not shipboard) level replicators. By the TNG era they'd just gotten a lot more sophisticated and ubiquitous, and could be used for things like holodecks, organ transplants, and the like.If such a thing happened, then the increased quality and availability of replicators would be a good explanation. (Sorry, off topic.)
Basically, I've always thought of the TOS era as a post-scarcity society, and the TNG era as a more advanced post-scarcity society. IOW, in the 23rd century they'd already worked out the technology (and the economic systems) for handing all basic human needs, without requiring full-time human labor... but out on the frontier things were often a little more seat-of-the-pants. By the TNG era they'd advanced to the point where they could handle luxuries without breaking a sweat, and even a starship or a colony world apparently functioned more like a resort hotel.
(I generally kinda hate to rely on VOY as a source for anything... but FWIW, as Memory Alpha reminds me, "By the founding of the Federation in the 22nd century, capitalism was no longer the economic system of Earth, being replaced by the New World Economy. According to Tom Paris, it was around this time that 'money went the way of the dinosaur.' (VOY: 'Dark Frontier')")
And as for relating this to the thread topic!...

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