Fortune frames a viral Musk claim (100% billionaire confiscation wonât solve the debt) against Sanders/Khannaâs new proposal: a 5% annual wealth tax on U.S. billionaires to fund a one-time $3,000 payment for most households and later social spending. The math comparison is directionally right but incomplete: it mixes stock wealth, annual flows, and implementation realities (avoidance, valuation, constitutionality, and political feasibility). The real buried angle is that both arguments rely on simplified arithmetic while the binding constraints are legal design, enforceability, and fiscal scale relative to structural deficits and rising interest costs.