On US being more meritocratic in tech -- completely agree. US tech space is very dynamic and very competitive which gives many younger folks a leg up.

But pure tech is a small part of all white collar jobs (the linked article references "white collar jobs", not "professionals" which the title substituded for it). And many non-tech white collar jobs are not nearly as meritocratic as those in the pure tech (I also agree that in Asia or Western Europe those jobs might be even less meritocratic, but this does not change the point above). My 2c.