Earlier quoted context omitted.
Did he “fuck out to the US” to work in privately owned businesses, or comparable university job? What prevented your friend to “fuck out” to a private business in the EU?
What difference would it make? Salaried position in EU would pay max 2x that and will end up in higher tax bracket, so net income will increase maybe 1.5x. This is leagues behind US. Europe is only for those high-skilled workers who don’t value money too much.
In your typical US setup you're going to be paying a lot more of your salary. Suppose no public transit, there goes ~15% of your salary for an automobile. Maybe an extra 5% to healthcare and health insurance, if you're healthy. If you're chronically ill or spontaneously get cancer go ahead and bump that up to 20%. Retirement, another 5% at least. And there's probably a bunch of other stuff I'm forgetting.
Point is: it's apples and oranges. It's nice if you're someone who is young, healthy, has no problem commuting two hours a day, etc. As soon as this is no longer true, it becomes a little bit tricky.