Sometimes I wonder if any new investment that I make in my skillset is just buying me a few more months of profitable employment at some point around say 2050. The loss of employment for less skilled labour is happening now, but I see no reason why eventually all labour could be supplanted by increasingly efficient machinery/robotics (for physical tasks), and AI for information/services tasks.

Capital is increasingly producing greater returns than labour, and market pressure is causing businesses to invest in capital as a result... but what does the economy do when labour cannot produce or earn, and hence cannot spend?