The population is increasing and the requirement for people is decreasing.
This gap is made wider by increased birth-rates and better automation. More people are being born into a world where fewer are required. That is quite a scary thought. Computers and machines automate and replace people everywhere.
I have some anecdotal evidence of this:
At my last business we used to follow-up twice via email with all of the people who had not responded to a quote that we had sent them. We had 50-100 enquiries a day so the follow-ups soon mounted up. I tried every CRM and mail-list manager out there. I could not find one that would trigger an email from my Gmail account if a contact had not responded. I was spending 3-4 hours a day doing the follow-ups. So were my staff. It got to the point where I wanted to hire someone to do it. Eventually I learnt more about the software and read up on ruby on rails. I hired a small software house to help with the backend, built the front-end myself and a month later, a machine replaced the humans and prevented a new hire. That is just one job at a tiny 5-person company. At scale, computer-based automation creates huge efficiencies. The flip-side of that are huge deficiencies in employment.
Here come the machines.