The OP is not claiming US labor laws are the best. The OP is saying that the US has decided that these are the laws it wants for itself and so if you want the o

The OP is not claiming US labor laws are the best. The OP is saying that the US has decided that these are the laws it wants for itself and so if you want the output of your work to be sold in America, then these are the standards that should be maintained. It’s similar to a Kosher or halal restaurant demanding that any meat that they purchase must adhere to the standards they have. The foreign workers are free to provide their services to non-American companies, just like a non kosher butcher is free to sell their meat to a different restaurant. It’s just not the rules that the US meets. And in fact, this is true if nearly everything you purchase. Ivory cannot be sold in the US. Blood diamonds cannot be so,d there. A whole host of products need to meet certain standards to be sold in the US. The OP is suggesting the same sort of laws apply to services that apply to goods.