> or the robot revolution will make goods so cheap that very little money/effort will be needed

Any such robot revolution would drive the cost of labor down faster than it'd drive the cost of goods. It might just not be immediately visible from every vantage point in society, because economic sectors will be taken out one by one - so today you live like a king because of all that cheap stuff, and tomorrow you can't afford it because you have no job, and hence no paycheck. So some form of basic income would still be needed for many.