mc must have been working in some black company where whatever profit he made was split 80-20, with his managers gaining the 80%. nowhere is that a normal split unless something shady is going on.
I'm assuming the Luck buff is
hugely in demand (as it should be) while being
very rare in the game itself, so 80% of the drops going to them probably isn't unheard of (even though I too think that's really high). MC still thinking with the game's logic, despite that 80/20 split very likely being a player-made consensus. My thinking is that even with that split, all parties are still profiting overall (since, from what we know of the game, the author hasn't really made the game balanced at all lol)
IMO, if it was more balanced, it would probably be closer to 60/40, with 60 going to the clown, since they seem to be a pretty good crit-based class in their own right and can probably handle a DPS role while also boosting the party's droprate