They don't just wake up one day and want to do this. They fear losing their power and want and try to maintain it at considerable cost to others due to that fear. The dynamics of society become such that the power imbalance and wealth inequality continues to increase, until eventually the threshold to something that is indistinguishable from slavery is passed.

Edit: By the way, just the other day the Trump admin trotted out a Doordash grandma in front of the cameras and asked her what she thought of trans women in sports. This grandma is doing doordash to pay off the medical debt of the cancer treatment of her dead husband because the US of A does not provide the minimum healthcare befitting of the richest country on Earth. We are already living in a dystopian fantasy.