Here's something you don't see every day: Jim Cramer agreeing with Elizabeth Warren on tax policy. The CNBC host voiced support Wednesday for the Massachusetts senator's push to make billionaires like Elon Musk (TSLA) and Jeff Bezos pay more into Social Security than workers whose wages are capped for payroll-tax purposes. Cramer sided with Warren on a proposal that would fundamentally change how the retirement program is funded.

Cramer wrote on X, "Nor should I. This is a very good idea even as it contravenes the way the law envisioned...," while quoting Warren's post. That's financial commentary with a side of political surprise.

In her own X post, Warren wrote, "Elon Musk and Jeff Bezos shouldn't be paying the same amount in Social Security tax as someone making $175,000 a year. Billionaires are not paying their fair share."

Her post shared a clip from her exchange with Dan Adcock of the National Committee to Preserve Social Security and Medicare during a Senate Special Committee on Aging hearing held March 25 and posted by her office on March 26.

The Math Behind The Argument

In the clip, Warren argues against raising the retirement age or cutting benefits and instead calls for expanding Social Security by taxing the wealthy more heavily. She says billionaires should not pay the same Social Security tax amount as someone making roughly the taxable wage cap and adds that her legislation "would raise enough money to increase benefits by $200 a month for every senior and help stabilize Social Security, make sure it is around for the long haul."

Warren also pointed to the Ultra-Millionaire Tax Act of 2026, which she reintroduced on March 26 with House allies. Her office says the bill would impose an annual wealth tax on the richest 0.15% of U.S. households, beginning with fortunes above $50 million, and would raise an estimated $6.2 trillion over 10 years.

Why This Cap Exists (And Why It's Controversial)

Here's how Social Security taxes work right now: The Old-Age, Survivors, and Disability Insurance payroll tax is 6.2% for employees and employers, each, but only on wages up to the annual taxable maximum. That maximum is $184,500 in 2026. Once you earn more than that, you stop paying Social Security taxes on additional income.

The wage cap limits both contributions and eventual benefits for high earners, even as the program faces mounting solvency pressure. Think of it this way: someone making $184,500 pays the same Social Security tax as someone making $184.5 million. That's the math Warren and now Cramer are calling into question.

The Social Security trustees said last year that the OASI trust fund is projected to be depleted in 2033, after which 77% of scheduled benefits would be payable. So the clock is ticking on finding solutions, and billionaires' tax bills might be part of the conversation whether they like it or not.