Money is just a stand-in for resources and labor, and if automation makes labor very very cheap, the rich will only need the natural resources the poor sit on, not anything from the poor themselves.
Alleged poor? When machines are cheaper than humans for any given task (as a result of both AI and robotic improvements) human beings will be destitute except for any ownership of resources they already have and can defend.
That means the vast majority of people will have no means of income or resources, unless they appropriate the use land or resources they don't own in a shadow economy.
But the appropriation of resources is not likely to be perceived positively by those that own the resources, given that ownership is the only thing separating the rich from the destitute.