It's a significant difference of degree. First of all H1B visa holders are not close to 90% of the US population, nor are they exploited to the degree that migrant workers are in Qatar (look at the death rates of those workers compared with US H1B visa holders). Similarly, the US doesn't allow H1B companies to take custody of the worker's passport, thereby locking them in the country. We should reform our H1B system, but these two things aren't particularly comparable.