Currently, the Fleet Leaderboard (on both Starbase and Embassy) display the credits that members have contributed toward said Fleet. Would it be possible to split this up into two segments, one displaying contributions as normal, whilst the other displaying how much dilithium each person has contributed?
Failing that, add some sort of requirement for fleet items that can't be obtained unless people have contributed a certain amount of their precious dilithium to their fleet. I know many people who are in a fleet contribute everything except for dilithium, and that isn't fair on the people who do contribute it (especially the 200k projects).
Such the requested feature would benefit those who make the sacrifice. Those people who can't part with their dilithium don't get all of the rewards. It only seems fair that way. If you want all the toys, you should damn well contribute like other people manage too.
I'm in a fleet of over 250, and our dilithium projects still run slow. If we can refine 8k a day, I don't think it's too much to ask that everyone spare 1k and put it toward their fleet. If they can't do that, they shouldn't be getting the benefits of the fleet system. They're no different from STF looters.