This makes it seem like there are n jobs and n+m people so all n jobs should be filled. That's silly. You don't just go out and find n people in some sort of ca

This makes it seem like there are n jobs and n+m people so all n jobs should be filled. That's silly. You don't just go out and find n people in some sort of cattle pen. There might be 20 times the the available potential employees, and companies may not want any of them. Similarly the other way, There could be tons of jobs at companies that no one would want to work at. If there are vacancies at companies, the companies are unwilling or unable to react to supply and demand capitalism.