I need to reread it but Paul Fussell makes the case that old wealth is inconspicuous and secure (and maybe inherited) versus nouveau riche which is about visible luxury, branding, and showy consumption. I don't remember if he mentions the need to promote ideas.
https://en.wikipedia.org/wiki/Class:_A_Guide_Through_the_Ame...
Paul Fussel’s Class was an interesting read
Meh dynastic families which are about as old money as you can get have some of the most ostentatious displays of wealth. They sit on thrones, wear crowns, and preside over public celebrations.