The problem with that is the same problem we have in the US right now.
What I (in humor) call, sponge economics.
Picture all of the gold on the shard as a bowl of water. (rl $ the same)
Each character is a tiny little sponge. Each soaking up just so much water.
But because there is no /character cap on water content, some sponges eventually start soaking up far more than the others. (Bill Gates)
As time goes on, those Big sponges have taken so much of the total water, that there is none left for the little "normal" sponges. They dry up and shrivel.
Graphic, funny, but terribly disturbing in that it applies perfectly to our economic system and the one you propose.
For a Closed economic system to function long term, it requires a limit on maximum holdings. Even adding more water (the government's solution so far) only helps for brief periods.
The bigger sponges' surface area (money they already have) lets them soak up the new water faster than the little ones can. So each time it happens, the "fix" fails sooner and sooner.
This ends my medication-induced economics lesson for the evening.