At that level of government, and with that amount of money, you'd think they would double check, tripple check and evern quadrupple check.
They did not miscalculate. That is of course what BO's administration would like you to believe. They simply used "less rosy" baseline numbers for the calculations. Either way, it did not change their outlook. I do not blame S&P for using different assumptions because frankly, you can't trust the Treasury Department's numbers. Clearly they will always err on the side of optimism.
I thought S&P admitted their mistake but stated the $2 trillion miscalculation was spread out over the next 10 years and they base their ratings on a 3 to 5 year outlook, so they were standing by their rating?