globalization, cheap easy access to air travel, and the internet are breaking down the systems that were working fine for countless years.
It's not limited to employment, either. Create a SaaS or other internet-based business and try to serve customers outside your nation. Or even outside the border of your state/territory/province. Entire services such as Paddle exist just to deal with this. But I suspect most people are trying to fly under the radar here using regular Stripe, etc. and not dealing with any of it, just like digital nomads do.
It's not limited to employment, either. Create a SaaS or other internet-based business and try to serve customers outside your nation. Or even outside the border of your state/territory/province. Entire services such as Paddle exist just to deal with this. But I suspect most people are trying to fly under the radar here using regular Stripe, etc. and not dealing with any of it, just like digital nomads do.