Proposed Provision: C1.5. Starting in 2018, allow workers to choose whether to have their payroll tax rate reduced by 2 percentage points. For each calendar year that a worker chooses to have their payroll tax reduced, their normal retirement age (NRA) increases 1 month. We assume 2/3 of workers each year will choose this payroll reduction. The General Fund of the Treasury reimburses the OASI and DI Trust Funds for the reduction in payroll tax revenue.