In essence, it's the 21st century equivalent of the "new money" industrialists of the 18th century. They weren't accepted by the established class either, and had to slowly bleed in over generations.
In fact, you still regularly hear the disparaging words "new money" today.
To be fair, flashy, tactless, and pointless displays of wealth for it's own sake is the kind of thing people are looking down upon when they use that term.
In fact, you still regularly hear the disparaging words "new money" today.