An interesting line of thought that I have also entertained in the past.
Suppose there was no one to collect the garbage and it began building up. Either someone is going to passionately swoop in and make it there life's work to clean up that garbage, or an alternative way of disposing garbage would be created by someone due to the demand for it.
Believe it or not there are people out there who absolutely love the jobs you or I wouldn't touch with a ten foot barge pole (being a barge polist, for example
). Otherwise there are people passionate about creating and delivering new ways of doing things if the demand exists.
Certainly there are people out there who are miserable in jobs that support you directly or indirectly. It would be blind to overlook that. Use it to your advantage. Think "these people suffer so I can do my job so I must do the best job I can.
The fact that you think about these people at all may suggest you would be a good person to liberate these unhappy people. Could you be passionate about it?