Some people don't seem to realize there is a limit to how much of added value a low skilled person can bring to the market. Plenty of people are essentially unable to contribute anything more complicated than their muscle power, others can contribute vision and recognition (professional drivers) - and this goes on and on in a continuum. There already is a class of people - low skilled, low IQ, poor mental health - that are essentially unemployable unless you need to dig trenches by hand. And the bar will keep rising and rising.