The main purpose of this legislative proposal is to improve how the costs of servicing the public debt are accounted for in budget estimates. It aims to ensure that any financial estimates provided by the Congressional Budget Office (CBO) or the Joint Committee on Taxation (JCT) include these debt servicing costs. This change is intended to provide a clearer picture of the government's financial obligations and overall fiscal health. Key provisions of the proposal state that the CBO and JCT must include the costs associated with servicing the public debt in their estimates.