I've never known anyone here in the US (friend, coworker, family member, acquaintance etc - Internet forums don't count) who has moved to Europe permanently. I know that many do, obviously, I just don't one personally. At the same time, I personally know many Europeans living here and have seen many more coming over the years.
I can't find hard data, but probably we should not say that "those who have the means to, do". It's likely more of "a tiny percentage of those who have the means to, do".
I can't find hard data, but probably we should not say that "those who have the means to, do". It's likely more of "a tiny percentage of those who have the means to, do".