I may be wrong but my understanding is that it's not uncommon to find out someone in the USA is a private pilot, no matter what their job is (e.g., if your grocer or mechanic mentioned they have a license you'd not be shocked).
Apparently it's much rarer in the EU, but that might not only be a cost issue.
Cost is not a barrier. Entry-level kit aircraft are cheap in the US, as in cheaper than some of the fancier trucks. The very basic micro-lites are cheaper than any new car.
Conversely, Europeans workers get to enjoy some hobbies more than Americans - such as frequent travel - not because of how much they earn, but because of work culture and paid vacation time rules.