“… {The National Inflation Association} believes that a AAA rating should be reserved for countries that have budget surpluses, low levels of debt that could easily be paid off without printing money, and low levels of inflation.
They would say that but the ratings are supposed to reflect default risk, not inflation risk and the ratings are not supposed to be a way of scold bad governments unless the bad governments are creating default risk.
If US government debt is not AAA then 95% of the AAA rated corporate debt is also not AAA and should be downgraded.
There has alway been a bizarre double standard between the way S&P, Moody's and Fitch rate municipal bonds compared to how they rate corporate bonds. In observable history lower rated municipal bonds have substantially less default risk then higher rated corporate bonds. I have not heard and explanation for why the ratings agencies rate some municipal bonds irrationally low. I guess the reason why the ratings agencies rate some corporate bonds irrationally high is because those corporations are paying the ratings agencies.
I read an article that said the ratings agencies stopped being competent in about 1990.