"Toads" by Philip Larkin - Tone

Mr. Larkin has ATTITUDE! He sets a tone evident throughtout his poem. From, "Why should I let the toad work/ Squat on my life?" with "No one actually starves," he brings a feeling of bitterness towards the lower class. Why bitterness? Bitterness towards the poor seems to be a paradox. Where could this bitterness towards the people that work for him come from? I believe it stems from the speakers desire to have some of their lifestyle - their friends, their family, their sense of community. The speaker has a bitter tone because he is jealous of some aspects of their lifestyle. I think the author did this to point out that those who are last have something that those who are first don't have, "For something sufficiently toad-like/Squats in me, too." That's his confession of his true feelings.