There will always be jobs for people to do. As long as their is death and taxes there will be jobs. Machines can’t take care of sadness and death. Jobs help with those types of things.
Ever since the Industrial Revolution there has been a healthy growth in population. It may be, at least in part, that capitalism was successful during this time because population growth created a pyramid effect that generated an ever-increasing demand that was filled by an ever-increasing workforce.
Although world population continues to grow, the rate of growth is tapering off. Also, productivity is going way up, so fewer people are required to supply the same demand. For a while there will be increased demand from an increasing population, and an increasingly wealthy population as countries in Africa, etc. finally get on the bandwagon.
But how long will that last? Also, more and more of what is demanded by people requires less and less to produce. A few people create a video for a few million bucks that can entertain billions for hours. What happens when virtual reality becomes a reality? Then people wouldn't even have to leave their homes to get all of their entertainment needs met. And they wouldn't even need to live in a large home. A small studio apartment with a virtual reality program that simulated life in a Beverly Hills mansion would be all they required.
In his Brave New World Aldous Huxley came up with things like Obstacle Golf, i.e. sports that required the purchase of ever more pieces of equipment. If the number of consumers is not going up fast enough, then the demand per consumer must be increased.
I think we've come to some sort of inflection point where increasing automation will more than keep up with increasing demand such that fewer workers will be needed as we move forward.
I don't currently support any type of government dole, but I also don't know what a better alternative would look like.