Answers (1)
There are several basic principles that you need to remember even when they are not obvious. The first is that economics and politics are intimately associated, but the one is not the other. The second is that money is never honest for long.
Various countries have tried fixed exchange rates, gold and silver. People happily exchanged the metals as market prices went up and down, until the government was bankrupted. A dual metal standard doesn't work. The USA had a fixed exchange rate, 9/10 troy ounce of silver for a paper dollar, but WW2 cost over half of all the money in the country. By the end, there was only enough silver to redeem 40% of the paper dollars. So they invented the Federal Reserve note, which is not legally a note. It is called a dollar bill, but it is not legally a bill either. The only proper name for it is "coupon". The mint was redeeming the coupons in gold at $42.20 per ounce.
But the country was still printing phony money at a legendary rate, and foreign governments were increasingly eager to trade US dollars for gold. In 1971 President Nixon ended the gold redemption, so the US dollar has floated since then.
"Float" means it is worth whatever someone will give you for it. In 1971 the USD was worth 1/42.2 ounce of gold, fixed rate. Today it is worth 1/1318 ounce of gold, floating rate. That tells us that about 97% of the nation's money is counterfeit. All nations use counterfeit money now. Not one has honest money.
I guess this seems like a long answer. That is because nobody teaches concepts of basic honesty, and your question amounts to "What is the advantage of basic honesty?"