[rabble]

So i think it's partially values and markets. Enough US companies know the transformational effect tech can have on a business where that's not really understood elsewhere. Just having part of the market get it means it drives up all prices. In the US you are quoted a price before taxes, many countries quote offers post taxes (including after income tax is taken out). That can make US salaries look MUCH higher. Because the employer doesn't think about taxes, if you're outside the US as a contractor or freelancing, you can get a much better deal.