The intermediate demographic and economic assumptions shown in table II.C1 reflect the Trustees’ best estimates of future experience, and therefore most of the figures in this overview depict only the outcomes under the intermediate assumptions. Any projection of the future is, of course, uncertain. For this reason, alternatives I (low-cost) and III (high-cost) are included to provide a range of possible future experience. The assumptions for these two alternatives are also shown in table II.C1, and their implications are highlighted in a separate section, beginning on page 15, on the uncertainty of the projections."
http://www.ssa.gov/oact/TR/2010/II_assump.html#95492The provide a baseline, worst case scenario, and best case scenario. To look at the best case scenario and then claim the trustee report says no changes are needed is intentionally deceptive. Statistically speaking the trustees as saying it will NOT be better than the best case scenario (upper bound), nor will it be worse than the worst case scenario (lower bound). There is a 50% chance things will be better than the intermediate projection but also a 50% chance things will be worse.
Using the upper bound for planning would be like saving for retirement based on a 32% annual stock market return. While it might happen it isn't what most people would consider prudent.
What they actually said:
Under the intermediate assumptions, OASDI cost generally increases more rapidly than tax income through 2035 because the retirement of the baby-boom generation increases the number of beneficiaries much faster than subsequent relatively low-birth-rate generations increase the labor force. From 2035 to 2050, the cost rate declines somewhat due principally to the aging of the already retired baby-boom generation. Thereafter, increases in life expectancy generally cause OASDI cost to again increase relative to tax income, but more slowly than prior to 2035. Annual cost is projected to exceed tax income in 2010 and 2011, to be less than tax income in 2012 through 2014, then to exceed tax income in 2015 and remain higher throughout the remainder of the long-range period. Interest earnings on trust fund assets alone will be sufficient to cover the annual difference between cost and tax revenue until 2025. The dollar level of the Trust Funds is projected to be drawn down beginning in 2025 until assets are exhausted in 2037. Individually, the DI fund is projected to be exhausted in 2018 and the OASI fund in 2040. For the 75‑year projection period, the actuarial deficit is 1.92 percent of taxable payroll, 0.08 percentage point smaller than in last year’s report. The open group unfunded obligation for OASDI over the 75‑year period is $5.4 trillion in present value and is $0.1 trillion more than the measured level of a year ago. If the assumptions, methods, starting values, and the law had all remained unchanged, the unfunded obligation would have risen to about $5.7 trillion due to the change in the valuation date.
And in Conclusion:
Under the long-range intermediate assumptions, annual cost for the OASDI program is projected to exceed tax income in 2010 and 2011, to be less than tax income in 2012 through 2014, then to exceed tax income in 2015 and remain higher throughout the remainder of the long-range period. The combined OASI and DI Trust Funds are projected to increase in dollar level through 2024, and then to decline and become exhausted and thus unable to pay scheduled benefits in full on a timely basis in 2037. However, the DI Trust Fund is projected to become exhausted in 2018, so some action will be needed in the next few years. At a minimum, a reallocation of the payroll tax rate between OASI and DI would be necessary, as was done in 1994.
For the combined OASDI Trust Funds to remain solvent throughout the 75‑year projection period, the combined payroll tax rate could be increased during the period in a manner equivalent to an immediate and permanent increase of 1.84 percentage points,1 scheduled benefits could be reduced during the period in a manner equivalent to an immediate and permanent reduction of 12.0 percent, general revenue transfers equivalent to $5.4 trillion in present value could be made during the period, or some combination of approaches could be adopted. Significantly larger changes would be required to maintain solvency beyond 75 years.
The projected trust fund shortfalls should be addressed in a timely way so that necessary changes can be phased in gradually and workers can be given time to plan for them. Implementing changes sooner will allow the needed revenue increases or benefit reductions to be spread over more generations. Social Security plays a critical role in the lives of 54 million beneficiaries and 155 million covered workers and their families in 2010. With informed discussion, creative thinking, and timely legislative action, present and future Congresses and Presidents can ensure that Social Security continues to protect future generations.