Ohio's Vax-a-Million lottery spent millions in taxpayer money and, per the best available studies, did not measurably boost vaccination rates. That is the real-world example. The math only looks simple if you assume price is the barrier. For many holdouts, it isn't: they lack paid time off, childcare, or they simply distrust the system. Cash doesn't solve those problems, and it can worsen distrust by looking like a bribe. You call it economics, but it's a blunt instrument. The spending could go to access, outreach, or paid leave, which actually target the gap. The only naive thing is assuming money alone moves a public health needle.