The main purpose of this legislation is to ensure that high-income individuals contribute a fairer share to the tax system. It aims to address perceived inequities in the tax code, particularly focusing on how certain financial activities of wealthy individuals are taxed. One of the key provisions of this law is the introduction of a new excise tax on specific types of secured loans and lines of credit. This tax is set at 20 percent of the amount borrowed during the taxable year. The tax applies to individuals with an adjusted gross income exceeding $400,000, or $450,000 for joint filers.