By looking at her Linkedin, it is easy to see what companies she is talking about, some big names up there. I think her viewpoint is a bit naive though. Of course a company will pay market rate in a european city if that is what it takes to be competitive. The fact that they pay their US employees more might create tensions inside the company but in the end is just down to the fact that the market there is completely different and that is what it takes to be competitive there.

In the beginning of my career i also had similar thoughts like "Why does the company make so much money when i am doing all the work" but while running my own business later i realized that it is not as simple. The company has a whole lot of risk and work bringing in projects and keeping everything afloat, as a programmer i did not have to worry about anything of that and only later i realized how much value that has, especially in a region where programming and consulting gigs weren't really easy to get.

Location really matters for programmer salaries. I went from a smaller european city where all there was for programmers were small software/marketing agencies to a european tech hub with a lot of startups and a booming market. My salary doubled just by changing location and living costs are still comparable and i finally feel i am getting paid what i am worth, which is still far from US standards though.