The "uber-rich" in the US do worry about the devaluation of the dollar, not because it is linked to their personal wealth (which it is not, because their wealth is in assets, not cash), but because devaluation of the dollar means people will not be able to spend money on things and keep the economy fluid. It is linked to issues such as raising the minimum wage and value of social programs. However, the same issues apply to the game.
The cost of doing a Surprise Attack is not related to the issue of coin, but more a result of the devaluation of map fragments due to the rarity provision house making them in bulk. However, the reason the loot spots have a higher price is not because they are worth more, but more that the relative value of the gold is lower compared to the consumable resources. The same applies to resources, that the value of these are increasing due to the gold in game. The differences in leveling buildings is more because of the fixed cost of the gold section of it, so that the few hundred gold coins needed are worth less than they were, making the upgrade less expensive in practical terms.