Has everyone forgotten the role played by the ratings agencies in the global financial crisis? Have any of those responsible for the wrongdoing of those agencies been punished for their destructive activities? Absolutely not! They have been protected from prosecution for their crimes. The ratings agencies in question have no useful or constructive role to play in the world and should, at the very least, be closed down.
The very idea that a monetarily sovereign government (meaning one that issues its own independent currency and has a floating currency exchange rate) is at risk of default on the securities issued by its Treasury is quite absurd. The contrary examples that are provided by those who do not understand this reality are always of governments that are not monetary sovereigns.