Bernie Sanders vs. Elon Musk: Would Taxing the Rich Actually Save Social Security?

Senator Bernie Sanders fired off a single sentence on X this month that frames the entire fight over how to keep Social Security solvent: “Today, Elon Musk, a trillionaire, pays the same amount into Social Security as someone making $184,500.” The Vermont independent paired the post with a bill he says would end that absurdity and expand benefits by $2,400 a year.

The stakes are real for anyone counting on a check. Social Security transfers hit $1,629.6 billion in the first quarter of 2026, the program’s trust fund is on track to be exhausted in 2033, and the long-term shortfall sits at $26.1 trillion over 75 years. If Congress does nothing, scheduled benefits get cut roughly a quarter across the board the day the fund hits zero.

Right diagnosis, partial cure

Sanders is correct that the payroll tax is steeply regressive at the top. He is wrong that lifting the cap on its own balances the books. The math is worth doing carefully because it tells you exactly how much of the gap his fix actually closes.

The Social Security payroll tax is 6.2% from the worker and 6.2% from the employer, for a combined 12.4%. It only applies to wages up to the cap, which is $184,500 in 2026. A worker who earns exactly the cap pays roughly $11,000 on the employee side. A worker who earns $1 million pays the same $11,439, which works out to an effective rate of roughly 1% on total wages. And a worker who earns $10 million still pays $11,439. That is the regressivity Sanders is pointing to, and it is real.

Musk’s case is more nuanced. His SpaceX salary is publicly disclosed at $54,000, which generates roughly $3,300 in employee-side payroll tax. The trillion-dollar net worth that produced the headline is paper wealth in Tesla (NASDAQ:TSLA | TSLA Price Prediction) and SpaceX shares. Stock that has not been sold does not generate wages, and Social Security does not tax capital gains, dividends, or unrealized appreciation. Sanders’ shorthand collapses two different tax bases into one sentence.

Closing the gap with payroll taxes alone would require raising the combined rate from 12.4% of wages to 15.9% of wages in 2035, with further increases after that, per the Stanford Institute for Economic Policy Research. Lifting the cap helps a lot but does not get you all the way there. Most independent estimates put cap removal at roughly half the 75-year shortfall, which is why serious reform packages pair it with either benefit changes or a broader tax base.

The variable that decides the answer

The single factor that determines whether Sanders’ fix works is where you draw the tax base. Tax wages above the cap and you raise considerable revenue from doctors, lawyers, executives, and senior engineers, the people whose income shows up on a W-2. You raise very little from the Musk archetype, whose compensation is structured in equity.

Tax investment income or net worth and you reach the trillion-dollar fortunes Sanders keeps invoking. Corporate profits hit $4,392.5 billion in the first quarter of 2026, up 12% from a year earlier. Asset income across the economy ran $4,284.4 billion in the same quarter. That is where the money the senator wants is actually sitting. A bill that only lifts the wage cap leaves it untouched.

Inflation makes the choice less abstract. The 2026 cost-of-living adjustment is 2.8%, while CPI ran from 321.465 in May 2025 to 335.123 in May 2026. Beneficiaries are losing ground in real terms before any trust-fund cut hits.

What to do with this

1. Pull your own benefit estimate. Log into your account at SSA.gov and look at the “scheduled” figure. Then mentally apply a 20% to 25% haircut to see what 2033 looks like if Congress does nothing.
2. Stress-test your retirement plan against two scenarios. Run it once assuming full scheduled benefits, once assuming the post-2033 reduction. The gap is your political risk exposure.
3. Watch which tax base each bill targets. Lifting the wage cap, taxing investment income, and taxing net worth are three different policies with very different revenue profiles. The label “tax the rich” covers all three and they are not interchangeable.
4. Track the annual Trustees Report. The depletion date moves a year or two each release. That number is the closest thing to a real countdown clock the program publishes.

The current cap does let the highest earners off cheaply, but fixing the cap alone will not save the program. Both statements can be true at once, and the reform that actually solves the math has to grapple with both.