Shareholder system does not work in the real world. Those who have money or influence already (guardian notes possibly) could be used to control the currency. Need to be finite, and simple. It makes no sense to hold on to the gold forever and let it sit there. If the extra gold were re-invested and pofits payed out to the current holders of XAU annually, that would fix the POS issue. Also there is about 55,000 dollars invested into this currency. Each XAU right now is greatly inflated by the crypto market already. And mining it at the moment is not profitable. So everyone is paying to create this coin. So if the second rule were changed to everyone with even a small amount has equal say in the coin. That would be better IMO. Also a business model needs to be created, and gold that is needed to back the currency held, and insured. Maybe burn XAU until there is enough to build a goldmining company? Then the company is owned by XAU holders. Should build infintely. And be completely democratic.
The mining is profitable (if you measure it in XAU, BTC or dollars) and holders get profits (measured in gold). Xaurum is not inflated because it isn't a 1:1 gold coin, it is an increasing commonwealth that uses gold to secure and increase value. A business model is already working (Auresco that buys stores gold gets rabate on gold purchases, miners get a discount, holders get more and more gold) so everyone is profiting from creating Xaurum.
As for voting, both 1-coin-1-vote and 1-wallet-1-vote are insufficient as systems of decision making. When we get to that point (not soon), it will not be by a simple vote system, but some kind of deliberation scheme (to avoid being determined by capital interests and popular false opinions).