Earlier quoted context omitted.
Largely you are correct. It works like this. If you are a net exporter, you are essentially giving away your own output to a foreign nation in exchange for bits of paper. The reason you can't spend that paper is that it would destroy your exports (your own currency would go sky high as the system tried to eliminate the imbalance) and you'd have to find something else for the people working in exports to do, or you'd…
This is largely nonsense - Botswana is on average net-neutral: https://tradingeconomics.com/botswana/balance-of-trade The poor countries more or less have to spend the dollars because they need to buy fuel and high tech. It's the rare exceptions that stockpile it, China and Norway, and they can afford to do that because they're oil-producing. > The poorer country would be better putting people to work creating domest…
You have to GIVE a currency value. What that means is that you must give people a reason to use that currency. Now internally in a country this is done through taxes and the bank system. Externally however this has to be done differently. It must be "guaranteed" to be exchangeable ... to the global reserve currency (so that anyone can buy what they want with it). How do you guarantee that exchange rate ? By having an instrument that's guaranteed to be exchangeable for the reserve currency. A lot of US treasuries, a little gold, a little EU sovereign bonds, ...
So instead you'd have to issue currency and make it exchangeable for local assets. So you'd loan that to local people to build roads, harbors, bridges, buildings, ... That doesn't work, because sovereignty means that you can't exchange those things for the global reserve currency anywhere near as well as you can US treasuries. Because investors are acutely aware that the government could just immediately impound their money (and there's lot of historical precedent of that actually happening), whether it's local currency or local assets. Investors would have to accept that they can bring money in, but not take it out. And good luck with that one.