A key feature of Obama's plan is a revised inflation adjustment called "chained CPI." This new formula would effectively curb annual increases in a broad swath of government programs but would have its biggest impact on Social Security. By encompassing Obama's offer to Boehner, R-Ohio, the plan would also include reductions in Medicare spending, much of it by targeting payments to health care providers and drug companies. The Medicare proposal also would require wealthier recipients to pay higher premiums or co-pays.