This song is about the importance that each person has. Bus driver is one of the least glamorous jobs, but the singer touches the lives of a lot of people and if he just disappeared one day, a lot of people would be affected. The chorus speaks to that saying that "you" would say that the singer is "just a bus driver and what do [you] know?" The singer refers to this again, asking almost that same question of "what do i know?" The end is pretty hard to rephrase. He's saying don't believe you're JUST anything (a busdriver, cook, lawyer, whatever) because even busdrivers are important when it's time to go home.
This song is about the importance that each person has. Bus driver is one of the least glamorous jobs, but the singer touches the lives of a lot of people and if he just disappeared one day, a lot of people would be affected. The chorus speaks to that saying that "you" would say that the singer is "just a bus driver and what do [you] know?" The singer refers to this again, asking almost that same question of "what do i know?" The end is pretty hard to rephrase. He's saying don't believe you're JUST anything (a busdriver, cook, lawyer, whatever) because even busdrivers are important when it's time to go home.