Lumanny the Space Jew
Picard has said many, many times that there is no money in the future. Yet a capitalist sort of society is referenced countless times throuout Star Trek series.
It is one of the biggest repetivie contradicitions in the Star Trek Universe.
The Federation uses Credits, which are both a bartering tool between other Governments, or used for products that are not easily replicated or produced. They have very little to no value, as most things can be made.
Imagine a Capitalist society. Now, imagine, the supply is so great everyone can have almost everything. It's a Post Scarcity economy. People have moved away from money because they don't need it. Which is why most societies in Star Trek don't accept Credits, they don't amount to much, and can only be used in exchanged for things the Federation can provide.
Let's say I want to buy a book. Buy? No, I can just download it to a PADD. A real book? I'm sure I can get an actual copy in print. A first edition of a book written in the late 1800s? I'm going to need credits.