If they ask questions like this, they may get a better understanding that will help in making meaningful laws that can better USD as a currency.
They will never ask, because they know the answer. They know they will loose the power, if another better currency takes their place. Most of the countries fear this only because they want to retain their Sovereign power - who can take decision about their currency.
If they actually know the answers and still act like this, that's kinda evilish move.