It's not always the case that the children of parents who've made fortunes in finance opt to go into the family career. Look at Skylar Handler, daughter of Jefferies' CEO Rich Handler, who seems to work for a talent and branding agency, or Jes Staley's daughter Alex, who at one point had something to do with drones but now appears to be a product manager. There are also plenty of finance progeny who've gone into music. His father has leapt to his defence on Twitter. For anyone who knows the older Marshall, this should come as no surprise.