The problem with that, as I see it, would be the higher amount of player involvement needed. This wouldn't be bad, but throwing numbers around to people will lead to miscalculation and manual character sheet updating, which again, leads to more errors.
There could be an interface for kings to dispose money to players, though.. if it could update all the character sheets with the electrum, it could work.
Overall, I like the idea, it just needs to be executed properly.