The main purpose of this legislation is to ensure that federal employees receive equal cost-of-living adjustments (COLAs) for their retirement annuities, regardless of whether they are part of the Federal Employees Retirement System (FERS) or the older Civil Service Retirement System (CSRS). The goal is to provide fair financial support to retirees by aligning the adjustments for inflation that affect their annuities. Key provisions of the legislation include a change to how COLAs are calculated for FERS annuities.