The words, phrases and their meanings and definitions couldn't have changed too much, because we can still follow the narrative of the story that's being presented.
But that's just it... in YOUR opinion. While for the TV audience (the early 21st century humans) those terms would mean what they mean (and I can tell you that even today they can be interpreted in other ways), for the characters of the fictional Trek, the definitions could mean something else.
There have been various times when certain systems were never sufficiently described... that doesn't mean one can or should superimpose contemporary views onto what was done in the show... because it would be presumptuous, and arrogant, not to mention very unscientific.
If a simple concept such as "bank" has changed meaning, then what in the world did Picard and Jake Sisko mean when they used the word "money."
Quite possibly it was meant in the same context it is used today, but keep in mind they used the term when dealing with races that had THEIR OWN economic system in place.
Prior to my post, I did look up the exact meaning of the word bank. Instead of using bank, the story could have employed the term repository, or storage facility, or data center. But the story didn't, the writers wanted the audience to understand what they were referring to when they said "Bank of Bolias." And what they meant was a financial institution.
Morn (from DS9) was a patron of the Bank of Bolias, he had an account with them (There's that word account again).
Which again could simply mean that Morn could have stored something else besides currency or money into his 'account'. 'Bank' as a term can also mean a repository or a storage facility. For Bolians in their own language, it could mean exactly that for all we know, but the translation to english would essentially be bank - to cater to the simple-minded folks of the late 20th and early 21st centuries.
Besides, I cannot stress how important it is NOT to make an assumption that Bolians were part of the UFP because it wasn't directly stated. Worf was from the Klingon Empire for example and they are not part of the UFP, just close allies.
Neelix was an ambassador, and Talax is not part of UFP.
For that matter, we don't know if Risa is part of the UFP because it was never stated.
It may be located in or surrounded by Federation territory, but not be part of it. That would mean that both Vash and Picard would have to use currency for getting things on Risa itself.
If he in fact has "a restaurant" then yes, Joseph prepares and serves food and drink, in return receives money, compensation, or value in some form.
We know he has a restaurant, prepares and serves food and drink... what we DON'T know if he's getting money, compensation or value in some form.
Think of the restaurant as an earth bound version of a star-ship mess hall. People go there to enjoy the setting, drink, eat, whatever, and Sisko's father could easily be doing all of that for free... although he could be getting material compensation from the economical system (in terms of food) so he wouldn't have to use his own personal replicator (if he has it). Why?
Because his service is recognized and he would likely be allocated a certain amount of food daily or weekly to feed the people so they can enjoy it.
Whoever said 'money' or 'currency' has to play a part of any kind?
Where's the 'no money' discussion? What were the problems in the transition? How do they interact with other systems? What (if anything) prevents people in the other systems from milking the no money system for foreign profit? Just as Robert Picard refuses to have a replicator, are there people on Earth who refuse the no money system?
Why would there be problems in the transition?
Once people's mentalities/priorities change, it's likely that they will adapt their systems to match.
Today people don't do it because those in positions of power DON'T WANT IT.
Short of a civil war or some kind of a conflict on part of those who put the governments in positions of power which would be based on the demand to CHANGE the economic system/model to something else, you won't get.
You think that people in the government would enjoy switching over their power to the people (as it should be in democracy btw)?
As for what prevents people from 'milking' the system in Trek...
I would surmise that the big touted 'mentality change' that ensued in the 5 decades after FC with the Vulcans and getting rid of money by forming the Federation in late 22nd century had something to do with it.
There are probably people in Trek who refuse to have a replicator or live in the money-less system.
Most (if not all) of those people leave Earth to do something else, and they usually dabble with races whose economies are currency/money based.