"[C]hained-CPI assumes that as prices increase, consumers make substitutions in what they purchase.... Social Security provides at least half of total household income for 65 percent of all aged beneficiaries. And for non-married beneficiaries, that figure rises to 74 percent, or nearly three-quarters of their income. For more than a third of all older beneficiaries, Social Security provides 90 percent or more of total income, while for non-married beneficiaries that figure rises to 46 percent. These are the people who would suffer most under a chained-CPI[.]"  MORE >>