How is the essence of the poem captured in the lines 'two tickets to Happiness'?

The narrator and his partner are homeless and they have nothing to go back to. They grieve on their loss of identity and home. Desperate to be happy, they are ready to pay for it. The picture presented is piteous and lamentable. Though they can not have the happiness in reality, they imagine an express that goes to a land of happiness and wish to purchase two ticket of it, one for the narrator and other for his partner. The narrator desperately looks for some place to board the train but every coach was full. It is death present everywhere and they can not afford to be happy as Hitler has called the whole Europe that “they must die”. Even in the end on a land far stretched with whiteness of snow everywhere, it is displeasing to see the Nazi army hunting the Jew couple, obviously, to kill them.