People work to create things... at this point there is a shared duopoly between humans and machines on creating things (in the past animals used to be heavily involved in this labor, and no longer are). Now think what happens if humans are not needed, especially in mass, to create things.
Right now if you're rich you need other humans to dig up coal or make solar panels so you can produce things and sell them to make the yacht you want. But what would happen if you no longer needed the middle part and all those humans that want rights and homes and such in the middle? They would not longer be a means, but a liability. Price no longer is a consideration, human capital is no longer a consideration, control of energy, resources, and compute now is.