what job is the most important ? Why?

I think that the most important job is a doctor 'cause they have power to cure almost everything :-) 

Each job is important in our life.  When you walk along a street you want  that street to be clear. And of course someone do this job- cleaning streeets. Doctor helps people to keep their health in good condition.  Police keep order within our society.   It will take a lot of time to enumerate all the jobs but   there is not a job which wouldn't be important. Unfortunately , some people are forced to do job which they don't like in order to earn money, provide family etc. Especially such situation exists in Ukraine, Russia.  

I agree with You, Charmy_Pinguin.

Yes, charmy pinguin thank you for your reply and you're right each job is important

I agree with Charmy tatally. Every career exists with its own significance, which we can't  alter. And in daily life we just choose the job we like and be interested in. We don't  have the right to criticise any other workers on the job position we dislike.