Multiple news organizations are reporting that House Speaker John Boehner included the so-called chained Consumer Price Index in his latest proposal to President Obama seeking to avert the fiscal cliff. This would put a big dent in the deficit — perhaps raising more than $290 billion over a decade — but it would hit federal and military retirees right in their pensions. Economists say the chained CPI is a more accurate method of determining inflation that is usually 0.25 to 0.30 percentage points lower than the current method. Adopting it for pensions, Social Security benefits and other indexed portions of…