Piggies by The Beatles is a satirical and critical commentary on the upper class and their behavior. The song uses the metaphor of 'piggies' to represent affluent and powerful individuals who live comfortably while indulging in greed and excess. Key themes in the song include social critique, inequality, and hypocrisy, as it highlights the disconnect between the wealthy and the less fortunate. Particularly poignant moments in the song include lines that vividly describe the piggies' luxurious lifestyle and their indifference to the struggles of others.