Maybe they have a slimmer margin over here, but they are still profitable. That implies that the model is (in principle) just alright, but there are financial flows that will have to change in the US. Of course you don't like to pay more for the labor you use to generate profit — ideally you wouldn't have to pay anyone at all!
If you can't run you business with minimum wage labor, maybe tou are not good at doing business and should change careers instead? Because many businesses in many nations have not the slightest issue doing just that.