Each profession, it must work to earn money, to the use to living. If anyone can do the job that I like, it will run. efficiency and the long-run, and are happy to do it.
Each class and then have to work to earn money. The money is used to sustain life. If anyone can operate it like it is working effectively. And it worked for a long time And would be happy to work there.
Each career that had to work to earn money. To get the money to the living. If everyone can do like that will work effectively. And the work for a long time. And be happy at work.