Where did you get you information on the family being wealthy? I couldn't find anything on them any more than I could Charles. What was their business background?
His father is listed as a banker, financier in the Who's Who in Finance and Banking (link: http://books.google....am hurd&f=false) and several of the missing persons websites stated that Charles was a manager for a mortgage company in NYC. He was living at the prestigious Kenmore Hall Hotel when he disappeared. I think all of these pieces add up to being wealthy and from a prominent family.
Also, I found a NYT article from February 1937 (not worth paying for) that referred to him as from "an old New York family" which I feel implies they were old money in the city.
NYT article dated February 27, 1937; 9 days after Charles disappeared: http://www.flickr.co...son/9615673163/