This isn't a Tesla thing, it's an automotive industry thing (as alluded to in the article). You often see this with foreign car companies, or more specifically, with foreign-based contractors.<p>Just a little background, first. The car manufacturers often times aren't the ones designing the machines that build their cars. They come up with general plans for the layout and process and then they hire various engineering companies who specialize in that particular manufacturing process. Obviously they work closely with those companies to ensure that the designs meet their requirements.<p>Those engineering firms will then design, build, and install the equipment. Some of that work is done by sub-contractors. If the engineering company is based outside of the US (in this case, German-based Eisenmann), they are likely to have local workers (nationally or continentally speaking) that they are used to hiring for their projects (because they're familiar with their work, already have contracts set up, have the language issues more or less worked out, etc.). When they get contracts for the US, they are going to want to use the same group of people instead of the more complicated and risky option of trying to build a local team. This is especially true for physical labor (e.g. installation, setup) because you need those people onsite.<p>So, often times when there's a big automotive construction project you have lots of foreigners happening to show up to the area with tourist visas. The engineering firm provides housing and vehicles so they don't have to worry about that. And they pay them in the country they're based out of.<p>The manufacturer probably knows it's going on, but they don't ask questions. And I don't think it should necessarily be their responsibility. Sure, if they were held liable they would pay more attention. But you could say the same thing about the contractor as well. From the article, "The company overseeing Tesla’s expansion project — Eisenmann, a German-based manufacturer of industrial systems — also denied in court that it had legal responsibility for Lesnik." Unless someone (anyone in the chain, really) is fined or punished, no one is going bother worrying about it.