Extravagance is the luxury of the poor; penury is the luxury of the rich
I was born ostentatious. They will list my name in the dictionary someday. They will use 'Imeldific' to mean ostentatious extravagance.
Nouveau riche is better than no riche.
Most people are resistant to ideas, especially new ones. But they are fascinated by character. Extravagance of personality is one way in which the pill can be sugared and the public induced to look at works dealing with ideas.