Can someone explain to me why I should regard adjustment of the inflation factor in the cost-of-living adjustment on Social Security as a red line not to be crossed? Is the proposed adjustment less accurate? Not "does it yield a lower payout" but "is it less accurate for capturing the impact of inflation to the beneficiary. This particular proposed change has been floating around in wonkland as a relatively harmless way to save some bucks for some years now, and I'd really like to understand why Progressives are so opposed to it.