Please whatever you decide, don’t make people do missions/quests. The main reason I like Empyrion is that there are no forced chores or the 2000s type “bring me 5 cups of coffee 300x type of quests” that are made for people having absolutely nothing better to do than mindlessly kill time. Please keep in mind the soul of Empyrion with this feature and stick to that it is completely up to you what you do and how you choose to obtain things.
With that in mind I suggest you add various ways to obtain “whitelist” to avoid loss of resources. It could be simple as the play time or discovering certain amount of poi or have certain amount of NPC’s killed. To fight inflation you could also allow to buy this whitelist with credits or RP. Say 50 million to reduce wiped OCD by 10%… Credits are nowadays often obtained through sell structures which massively reduces gained and stored resources and actually increases scarcity a lot. If it wasn’t for rich asteroids most resources would be a lot less common now because they are turned to minimal amount of credits.
And for sure can keep the star fragments as one of the options. I like that idea 100%, just to stick to the soul of the game and genre, add more options. I would say increase the base rate, maybe 30-50% per season with various ways to lower it with let’s say 30-70 hours of activity of players choice. This should mean players don’t really need to pay attention to it for as long as they are playing