“Before we discuss the nuances of the different measures of the CPI, it is important to keep in mind that millions of Americans rely on Social Security benefits for income protection. In fact, 65% of all beneficiaries rely on Social Security to provide 50% or more of their incomes, while 36% rely on benefits for 90% or more of their incomes. For non-married beneficiaries, including widows, the reliance is higher with 74% relying on benefits for 50% or more of their incomes and 46% relying for 90% or more of their incomes.”
http://www.marketwatch.com/story/chained-cpi-diet-cola-for-social-security-2012-12-20
