In my opinion, it's a foundational issue.
It's easy to make money mean something in a Cyberpunk game, because the squad is constantly desperate for money. Cybernetics, living conditions, food, bribes - eddies make the world go 'round.
In 5E, all of those are solved by magic. Goodberry, charm person, tiny hut. It's hard to make money important when the game itself doesn't view it as important.
I would go the opposite route: simplify money. Make it a score (like Call of Cthulhu). It comes up when necessary, but otherwise - ignore it, because it doesn't matter.