lol the moment some nerd tried to tax me in a video game id tell them to piss off, seriously.
for the record between the two fleets ive been a member of over the year ive donated over 20 million in total contribs
Then don't join one in EVE
Now on topic. I can see how such a system could work. If we look at WoW and how it handles this. At certain levels the guilds get a perk that means that a certain percentage of the gold earned by players goes into the guild bank. However unlike how some would think it works the guild member loses nothing. If a guild member gets 100g from a drop 10g is given to the guild bank by the system, so that person still gets the full 100g. It doesn't work with sales to vendors or on the AH.
Given how hard it can be to get dil donated to fleet projects maybe a similar thing can be added here. However I would set it at 1% minimum 5% maximum for a full days refine. Again like in WoW this would be given by the system the person refining would still get the full amount they refine that day. For example let's say it is at 5% I refine a full 8k dil, I get the 8k in full, and the fleet gets 400 dil from the system.
For this to work and not get abused there would have to be some sort of dil repository that can only be used for fleet projects and nothing else and no dil can be removed from it. However I am not sure how hard that would be to code for. this repository would then allow those who have permission to move that dil to the project they want to use it on.
This would not be instead of the donation system we have now, just as a bonus to it. Given how much dil is needed for many projects I don't think it would remove the dil sink that are fleet projects.
I'm not sure how this could work for EC as we get most of it from selling things. Expertise is not that hard to get, so I don't think it should apply.
A simpler way would be to increase the amount of credits you get from donating dil to the same you get for donating marks. This would also help those who don't get the chance to donate marks as it would encourage them to donate dil to get the credits.
Personally I donate what I can to my fleet, and I have no problem doing that.