> Second, it's immoral. Taking money from one person and giving it to another by force is wrong, especially when your justification is that you think they have too much money.
Also known as taxation, or living in a society. If you don't like money being taken from you by force then fine, just please opt out of all the services and benefits the society provides for you. This is in fact entirely doable, and it's called "renunciation of citizenship".
RE the automation angle, you're ignoring the automation quality aspect. Humans can basically provide three types of labour - physical labour, cognitive labour and social labour. The first type is already almost completely eliminated by the first wave of automation, starting with industrial revolution. Current wave of automation is making inroads in the second one. Just how many people you think we can fit in jobs which value is mostly created by the fact they're done by a human (e.g. psychologist, waitress, nanny)?