"Baby, You're a Rich Man" is a song that appears in Magical Mystery Tour. It was written by John Lennon and Paul McCartney. It was recorded on May 11, 1967 and released on July 7, 1967 in the UK and on July 17, 1967 in the US.
At the time Paul McCartney and John Lennon were working on two separate songs: John was doing "One of the Beautiful People" and Paul was doing "Baby, You're a Rich Man." So, the took the verses from "One of the Beatiful People" and merged it with the chorus from "Baby, You're a Rich Man."
Due to the fact that "Baby, You're a Rich Man" appeared briefly in the movie, the song was not featured on the soundtrack.
The song was instead included in the Yellow Submarine Songtrack, released in 1999.
It will be featured more prominently in the remake.