Imo, the solution lays in teaching people through songs, books, movies, TV series that being wealthy is a good thing, but being overly rich, collecting airplanes, buying several houses worth millions USD each etc. is disgusting.
Disagree. Why is it disgusting? It is bad for other people when you steal money from them (generally), but if you earn lots of money and like the planes, why should it be disgusting to collect them?
Although I can really sympathize with your sentiment, I disagree in some parts since some ideas mentioned may prove to be a bringer of more problems than solutions (no offense).
May I ask you to expand this a little bit more? Your thoughts may be a fine addition to whole topic.