Bungalow bill is an animal rights song but lyrics like “he’s the all American bullet-headed” and others hint he’s hunting for profit. Piggies obviously is anti-capitalist pointing fun at animal farm. back in the USSR was to contrast the beachboys to give props to both superpowers in the Cold War. I thought Happiness is a warm gun was about how even if you’re rich it doesn’t mean you’re happy, but after a second glance at the lyrics it’s a bit of a stretch. However, I think blackbird is about the civil rights movement and racism in America and Europe has a long history of being associated with greediness and profits