Answer:
In this passage, Harburg explains that his music is giving voice to the working class and soldiers who fought in the wars.
Explanation:
Harburg, is referring to the working class when he says, "I built the railroads. I built this tower," literally showing how the working class is important and deserve a voice in their favor. Similarly, when Harburg speaks of "I fought your wars" he is referring to the soldiers who fought in wars and took the victory to his country.
In the passage "Why the hell should I be standing in line now? What happened to all this wealth I created?", Harburg reinforces the idea that workers and soldiers have built the wealth of their nations and should not be treated with less than they deserve.
