A9 · Pillar A · Revenue Optimization
Tax-expenditure review and restructuring
Systematic review of the largest tax expenditures, prioritizing low documented return, regressive incidence, or leakage to foreign beneficiaries. Initial priorities: long-term phase-down of SALT (over 10–15 years, acknowledging the 2025 cap expansion), further limits on the mortgage-interest deduction, and tighter opportunity-zone treatment.
- 10-year fiscal
- +$250BRevenue
- Implementation
- Years 3–15
- Middle class
- Variable
- Planetary
- Neutral
$180B–$350B · Medium confidence
Long-term SALT phase-down concentrates on high-tax states and uses an extended phase-in.
No material climate effect.
Global precedent
Most OECD jurisdictions operate substantially more limited tax-preference systems than the United States, with documented horizontal-equity benefits.
Lead mechanism
Treasury, Joint Committee on Taxation; Senate Finance; House Ways and Means.
Bipartisan framing
Conservative case
Base-broadening that can enable lower marginal rates.
Progressive case
Addresses regressivity of the largest tax expenditures.
Figures in this framework are illustrative directional estimates derived from publicly available data and conventional Congressional Budget Office budget-window logic. They are not official CBO scores. Any provision adopted from this framework would require formal CBO scoring before legislative consideration. This document is a policy white paper, not an introduced bill.