More backstory to the song. Woodie Guthrie's song like a lot of other left/center-left passion at the time was devoted to a second front in Europe. Stalingrad had only just occurred, and Germany was by no means defeated.
When she sings "good people what are we waiting on?" she means the second front. The only way a second front could succeed was if the allies had achieved air superiority over the battlefield. The only way to do that was Operation Pointblank which was the bombing campaign brought to Germany to defeat the Luftwaffe in battle. That was going extremely badly in 1943 and would not finally gain successes without the introduction of the P51 escort fighter in late 1943, which allowed the USAAF to mount "Big Week" in February 1944 which achieved the knockout blow against the Luftwaffe necessary to give planners confidence to launch the Normandy invasion. This was a technical accomplishment as much as a feat of will. It took extraordinary will to continue to get into those bombers and go up against the Luftwaffe with losses like this. In the eyes of Crosley and Rosenthal and all the characters already shot down who are on their way to the Stalags we see how much that will test their wills.