"A new estimate from Moody's Investor Services triples national public pension debt from $766 million to $2.2 trillion, mainly because the major Wall Street bond-rating firm uses a lower forecast of pension fund investment earnings urged by critics. In a reporting overhaul proposed last week to give investors a better way to compare pension funding, Moody's uses an annual earnings forecast based on corporate bonds, 5.5 percent, much lower than the 7.5 to 8.25 percent forecast by pension funds.... [C]ritics say unrealistic pension system forecasts hide massive long-term debt, easing pressure for urgently needed cost-cutting reforms such as lower pension benefits and higher payments into the pension fund from employers and employees."