Does including Social Security change measured wealth inequality trends?
Core argument: Including Social Security wealth, the shares of the top 10% and top 1% increased by 1.1 and 1.6 percentage points, leaving top wealth shares little changed over three decades.
Top wealth shares have not changed much over the last three decades when Social Security is properly accounted for. This is because Social Security wealth increased substantially from $7 trillion in 1989 to $39 trillion in 2019 and now represents 49% of the wealth of the bottom 90% of the wealth distribution. For retirees, we calculate Social Security wealth from the SCF directly by valuing reported benefits as a lifetime annuity. Once Social Security wealth is included the shares of the top 10% and top 1% increased by 1.1 and 1.6 pp, respectively. The present value of Social Security benefits depends on the choice of an appropriate discount rate. We first offer a risk-free valuation of Social Security wealth using the Treasury market yield curve. We find that the share of “marketable wealth” owned by the top 10% and 1% grew by approximately 9 and 6 percentage points (pp) between 1989 and 2019, in line with existing estimates.


