The point of mithril is that it's a rare thing. You can only get it from system wars( or mith sales). Making a daily mithril bonus would lower incentives for system wars even mire than they ready are. Besides, you don't even have the Lvl. 2 castle do why do you want mithril in the first place?
I'm pretty sure mithril and crystals were never meant to be rare... People were originally meant to do quests, in which drop xtals, and wars give mithril
How about you work for your rewards? That's why this game is better then the others. If you don't play, you don't get ****