Reduce individual Social Security benefits if modified adjusted gross income, or MAGI (AGI less taxable Social Security benefits plus nontaxable interest income) is above $60,000 for single taxpayers or $120,000 for taxpayers filing jointly. This provision is effective for individuals newly eligible for benefits in 2019 or later. The percentage reduction increases linearly up to 50 percent for single/joint filers with MAGI of $180,000/$360,000 or above. Index the MAGI thresholds for years after 2019, based on changes in the average wage index (AWI).