No, it's because the companies aren't encumbered with a million layers of bureaucracy and regulation ensuring every single employee has every single possible safety net in the world preventing every single type of failure known.
Sure that must be the only reason, no-one would think of ever creating a company in socialist Europe. Having access to a huge, uniform market must not factor into this at all. Or any 100 other good reasons you're ignoring from a complex spectrum; no it must be the one and only one that fits your narrative.