MMR vaccines would be a net positive to the US economy, to the tune of $3.5B in direct savings (14x benefit/cost) and $7.6 billion (26x benefit/cost) in wider societal benefits [1]. Those are 2004 figures, so the dollar amount savings would be even bigger now.
To a point made further up the chain: The US's woes aren't driven by AI investment, but the self-interest of a select group. Compare it to a thief who causes $20,000 damage to steal a $100 stereo from a car.