The point about cost ("My money reserves are finite...") seems to be addressed by Carla's superior productivity. To pay someone in your own country would definitionally cost more than paying someone in a more productive country (assuming identical output, ignoring shipping cost, etc). I think your analogy of 1 nation == 1 person is obscuring complexity as well. A country with a market economy couldn't simply _do_ something, they'd have to pay for it (with incentives, taxation, debt, etc.), even if they aren't trading with another country. In terms of your analogy, if you want to do your own "farming, mining, and homebuilding", then you'd have to pay "yourself" more than you'd pay Carla, or accept inferior output.These points make me consider that what you mean by "money reserves" refers not to actual currency, but to something like trade deficit. If this is the case, can/should nations make decisions about their economies and trade policies based on projections of trade deficits?
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