Okay, my (new) wish:
1.) Leave the "no money in the future" - angle of Star Trek intact. Earth and the Federation in Star Trek is a post-scarcity society. It's one of the core characteristics of Star Trek.
2) Don't explain how it works. We have 400+ years to figure that out. If we could solve this on internet boards, we would have our Utopia by now.
3.) People in the future still have jobs. It's just that people can do what they want. They just don't get paid for it, but that's because they already HAVE everything they can get. But you still have the usual work/holiday balance and need experience to advance in your job and achieve personal fullfillment.
4) Federation credits.
5) Seriously, Federation credits. How do they not contradict the "no money"-rule? Well, it's because our starship is out there, in the FRONTIER: And the Frontier is NO post-scarcity place. Meaning Earth (and everyone on it) has limitless ressources. If you want to travel on a starship, you can take only limited ressources with you. Federation credits. Each crewmember gets an undisclosed amount of them. Wherever they go, they are still the richest assholes around. On the starship itself they are meaningless (the crew doesn't care for accumulated wealth, because back on earth it's meaningless. The crew trades in replicator rations and holodeck- and spare-time). But whenever they leave the ship, Federation credit is the go-to ressource for trading and dealing with merchants, who themselves can exchange those credits for Federation-/allied resources like anti-matter, technology or replicator raw mixture, on places (and stations) that aren't in the 'post-scarcity'-zone of the Federation core worlds.