I'm don't understand what you mean. Do you mean that some work needs to be done by someone or something in order for modern society to exist? Or do you mean that everyone needs to work in order for them to participate in society?

Generally speaking the more education a person has and the more difficult their career is to enter/how long they have been in it correlate with them having more to lose. Sure they may be a crook - sometimes high corporate officials like directors and vice presidents get caught committing petty crimes - but it means they probably aren't going to rape you or mug you for your wallet. Because they have a lot to lose, and also they can get what they want other ways.

It's not a guaranteed rule but there almost certainly is heavy statistical correlation, where the most dangerous person to be around is the homeless man, the low end retail/fast food worker is less dangerous but still dangerous if they aren't young, and so on up the totem pole. With the notable exception that criminality may actually increase at the very top.