The bourgeoisie and the proletariat were terms used by Karl Marx. Karl Marx followers use those terms. No real American does,unless asked about Karl Marx and/or his Commie Manifesto.
I believe your hero is a student of Marx as she refers to the “ruling class”.
Sometimes I like to throw the pop Leftist terms right back in their face but the message is always upsetting to THEM. It surprises the Leftist trendy set to be put down with their own pet words and concepts. They are the “exploiters” and the “controllers” and servants of the “power brokers”.