Of course, it would be stupid to deny that money plays an important part in her character. But ask anyone who isn't too familiar with Splatoon to describe pearl and I doubt that "rich" would be one of the first things to come to their mind
Three, Pearl is close the punk scene, and it seems that she grew up in this environment as a young adult. Punks are inherently linked to concepts like anticapitalism, anarchy (y'know, team chaos...), freedom of the individual and anticonformism. These describe pearl quite well
There is no way that she grew up in this scene without learning about these concepts and at least adhering to them in some way. The reason why she got into punk was most likely to express herself, meaning she probably went through some personal retrospective at some point.
Four, Pearl is humble. And what I mean by that isn't that Pearl doesn't talk about her money. She does, obviously. But rather that Pearl's wealth doesn't seem to make her feel superior in any way to others. She will talk to you like any other person no matter your status.
It was obvious with how she treated Marina when they first met. It's also seen with the fact that she's friend's with the agents, even calling Eight a really good friend of hers. But it's also still present to this day with Damp Socks.
Damp Socks could've been formed in many different ways. But Pearl actually found everyone on social medias. These people were just random dudes she found cool and that she got into a big adventure Imagine if Lady gaga randomly came into your DMs and went "yo wanna make a band ?"
Five, Pearl's wealth is so stupidly big that it's often played as a joke. She has a bus line stopping specifically for her house. She was gifted a giant boat when she was like 10yo. She also designed camp triggerfish and made the theme song because why the fuck not
Same for her new outfit in damp socks. She spent like half a million dollar's worth on her new jacket. Why ? because she wanted it to be made out of the same material as actual astronaut jackets. That's like. STUPIDLY precise but you do you girl you paid those designers well
Six, Pearl works hard. She was born into wealth, but nowadays, the reason why she has money is because her band is successful. Pearl has always shown a desire to improve herself, to change and try new things, to work into building up a future for herself and Marina.
That's one of the reasons why she wanted chaos. She refuses to get stuck in a box that would keep bringing her wealth and fame but that would ultimately make her feel like she doesn't improve anymore. Damp Socks is a manifestation of Pearl's wish to grow up.
And finally, and most importantly ... Pearl has never, NEVER used her money to oppress people. She did the opposite. That's actually really simple but that's also the reason why people hate the rich in our world. They maintain their wealth by oppressing others.
Pearl doesn't exploit her workers. If anything, her being willing to pay 500k for a jacket would show the opposite : she values other's work and is more than ready to give them what they're worth. And we know for a fact that she uses her wealth to spoil Marina.