Author is basically engaging in a form of geographic arbitrage by working remote from Europe. They get to enjoy wages comparable to U.S. programmers, but get the European social safety net, and since they're not living in a big city, rural cost of living. It's not unlike U.S. tech workers who choose to live in a remote rural village, or Californians who retire to Boise at age 30, or Canadians who come to Silicon Valley to work for a FANG and found a startup and then retire to Canada after doing that for 7-10 years. (The latter is my favorite, because Canada allows citizens a step up in capital gains basis upon moving back to Canada, so you can make literally millions in Silicon Valley stock over a few years and pay zero tax on it, then enjoy the Canadian social safety net for retirement.)