The Begich bill would lift the current payroll tax cap, which exempts wages in excess of a certain amount ($110,100 this year) from the tax. In turn, it would give high earners, who would pay more, additional benefits upon retirement, just as benefits increase as wages do for workers below the cap. […] It also increases benefits across-the-board. While Bowles-Simpson and Domenici-Rivlin adopt a stingier “chained CPI” measure for inflation, Begich adopts “CPI-E,” or a measure that specifically captures inflation in goods that seniors buy. Due to deteriorated health and other considerations, goods seniors buy tend to be more expensive than those younger people purchase. Begich’s CPI-E change would mean, effectively, a 4.5 percent benefit increase for the program’s beneficiaries, including not just seniors but their designated survivors and disabled Americans as well.