The article explores how new technology can affect wages and employment in a workforce with different skill levels. When technology increases the need for skilled workers and decreases the need for unskilled workers, it can lead to higher unemployment and lower total employment in certain sectors. This is because the increase in skilled workers is not enough to offset the decrease in unskilled workers. Factors like efficiency wages and minimum wage laws can make this impact even worse. So, technological progress that favors skilled workers can actually hurt overall employment in some industries.