I see a problem with this. If this is the case then all gold will first have to be spent by mines in order to reach the general population. That gives them a unique situation whereby they are in ‘control’ of the money supply
If by “in control” you mean in control of whether or not the individual miner converts his gold into money, then you are correct. If you’re implying that “they” act as one to increase or decrease the value of money by converting or not converting gold, or by mining or not mining it, then you run into a problem. The value of gold on the market, aside from its value as money, derives partially from the value individuals place on it for its usefulness in electronics, ornamentation, medicine, etc. That is the demand for gold. It also derives partially from the cost of mining and refining, which is the supply. The price of gold at any given time derives from the combination of these, being the equilibrium point where the demand just equals supply. If the price rises above that point, temporarily, due to increased demand, then gold mines will find it profitable to mine more difficult to reach/refine ores, until the supply increase drives down the price to the point where the return on mining effort does not justify additional mining.
(edit: ) If, on the other hand, the cost of producing gold goes down, as it did in the late 1800’s when the cyanide process was created, the supply of gold will increase significantly driving down its price. Of course, at the time, money was measured in gold, so the “price” of gold did not go down, but the dollar price of all other goods went up, reflecting the lower “real” value of gold and dollars from the increase in supply, which resulted from the decrease in cost of production.
I would assume the mines itself ( owners thereof) make the bulk of the profit. What would they spent it on?
The owners, by definition, make all of the “profit,” which is the difference between the price paid them by the banks, and the cost required to produce the gold, including equipment, labor, etc. They would spend it on whatever returns the most value to them, but I would guess: Food, housing, transportation, medicine, luxuries, etc.
If all the wealth in the world is represented by the available gold supply and all additional growth in the economy needs to be accounted for by movement of the ‘price’ of gold minus of course the inputs by the mines themselves then I have this nagging feeling there will be a problem.
Can you define “wealth?” Do you include real estate as wealth? Cars? Stocks? Bonds? Or only cash? Cash is a store of wealth, useful for the efficient exchange of value. Not the store of wealth.
Explicitly marked valuation means nothing.
Remind me never to ask you for change.