Us needing to work does not meant that the jobs will still be there for us to work at.
The reason so much money goes into automation is simply because it cuts the payroll. The argument that there have always been jobs in the past, so there will always be jobs in the future, simply does not follow..
There will always be jobs, their nature will just be different. Even if you make the machines, someone has to design them, program them and set them up. And even if we automate the automating, we will still be able to create art and as long as it brings any value to others, it will be worth paying for, making it good old work.
Us needing to work does not meant that the jobs will still be there for us to work at.
The reason so much money goes into automation is simply because it cuts the payroll. The argument that there have always been jobs in the past, so there will always be jobs in the future, simply does not follow..