The main purpose of this legislation, known as the Equal COLA Act, is to ensure that retirees under the Federal Employees Retirement System (FERS) receive the same cost-of-living adjustments (COLAs) as those under the Civil Service Retirement System (CSRS). This aims to create fairness in how retirement benefits are adjusted for inflation, helping to maintain the purchasing power of retirees. The key provisions of the Act include a change to the way COLAs are calculated for FERS annuities.