Reading some ScroogeMcDuck comics coincidentally after reading Daisy Miller got me wondering — Could John D. Rockerduck's popularity in Europe somehow be related to the traditional "old money vs. new money" conflict between old European and American values? Glomgold may be a dishonest Corrupt Corporate Executive, but he is a Self-Made Man like Scrooge. Scrooge's conflict with someone who inherited his fortune like Rockerduck might be more significant to Europeans. Or I could just be far too presumptuous.
I think you're reading far to much into that. In fact, I, even though I'm an European, prefer 'self-made men'. Times changed, I do not believe that the Europeans still (if they ever did as a whole group) find someone who inherited his fortune more important. ('Cept maybe the English.)