The US senator slammed the tycoon over his defense of H-1B visas, arguing they help replace Americans with low-wage foreign workers US Senator Bernie Sanders has taken a swipe at Elon Musk over his defense of the H-1B immigration program, arguing that it only helps enrich billionaires who rely on cheap foreign labor while undermining ordinary Americans. The H-1B visa program allows US companies to employ foreign workers in fields requiring advanced skills in fields such as technology,