For a fair comparison, look at contracting/freelance in Europe. You will have the same social safety net and benefits as the US (i.e. none) and the pay will be

For a fair comparison, look at contracting/freelance in Europe. You will have the same social safety net and benefits as the US (i.e. none) and the pay will be around 160kEUR per year (180kUSD) with 7 weeks of holiday. Given our lower cost of living you might even be better off.