The cost of hiring in the US versus elsewhere is already greater than $100k for the type of tech firm that can just open an international office. I took the base salaries of Google SWEs on levels.fyi for NYC, London, Bengaluru, and Toronto, multiplied them by the standard 1.4 for overhead, and realized the US is already significantly more expensive than most developed countries, let alone the Global South. Companies clearly value employing in America despite the cost.