The main purpose of this legislation is to change how Congress obtains budget estimates for proposed laws. It aims to allow Congress to request financial estimates from private accounting firms instead of relying solely on the Congressional Budget Office (CBO). This change is intended to improve the process of budget enforcement and provide alternative estimates that may be seen as more reliable or less partisan. Key provisions of the legislation include allowing the chairs of congressional committees to obtain estimates from reputable accounting firms for any public bill or resolution.