In the last 5 to 10 years everything seems to suck: product's and services quality plummeted, everything from homes to cars to food became really expensive, technology stopped to help us to be something designed to f@ck with us and our money, nobody seems to be able to hold a job anymore, everyone is broke. Life seems worse in general.
We don't just let them, we cheer them on. Look at the celebrity worship culture we humans have. If you took away the person and left only their actions, most of us would happily throw the rich into a woodchipper. But they use their money to convince us that they're special and deserve praise, and most of us go along with it because we're sheep.
While I agree her image is at the very least somewhat exaggerated, her net worth probably puts her somewhere in the top 10%. She's not exactly the powerful elite.
I found out recently that the land that her ranch sits on is at least adjacent to, if not directly involved in the events shown in Killers of the Flower Moon.