The only thing oligarchs want to do and have wanted to do since human societies first emerged is to make sure life is an amusement park for them.
The first Mesopotamian king, or the Egyptian pharaohs, or Roman emperors, or Louis XIV and his nobility, or Kim Jong-un, it's all the same.
The only thing they care about is that they get to live in palaces and the champagne and wine keeps flowing.
Anything threatening that order is to be suppressed with violence or ignoring. They are sociopaths whose main objective in life is to get through it as easily and luxuriously as possible.
They don't give two shits about some random peasant or depressed poor person. To even entertain that thought is humorous.
Oligarchies have never disappeared in western countries that either have no monarchy left or only figurehead monarchs.
Billionaires are now the oligarchs. They are the nobility but without titles so you don't even know who some of them are.
They are anonymous and own 90% of all wealth on Earth despite consisting of a couple thousand people at most.