Nearly four million people already work in household services, which include health, education, hospitality and art & recreation.
Then there are over two million in business services. That makes six million service workers in total — three times more than work in construction and manufacturing combined. The shift was started by outsourcing to China. It will be accelerated by computerisation.
Blue collar or white collar are going to become silly labels. Instead there will be higher paid service jobs, (e.g. doctors, lawyers) and lower paid ones, (e.g. in fast food service.) We might start referring to business card jobs vs. name badge jobs.