Let's not forget that Pink Floyd, after all , is a Rock band and besides all the filosophy they have and wanted to transmit, they still wanted to rock out. As Waers says, money says exactly what we wanted wih DSotM: Get famous, get money(even in Live in Pompeii they say so).

I always liked to compare DSotM with Echoes, and in this case Money would be the blusey part of Echoes(only that less experimental)... now... what that part tells you in the song??? maybe some people would think it'll be a better song without it, I disagree. It's still about Rock'n'Roll, to have a good time with the music(and it's by far one of the greatest rock songs ever, comparable to Zeppelin's classic and that sort).
Besides, The song itself is a marvelous comparison of what the money wolrd is: joy, frenezy, and "happyness" so I don't think a more "soft" song, like the rest of Dark Side's songs would had been a better idea. It is not in disscordance withthe album because it tells exactly what the money is and what it generates(altough for me it's the weakest lyric in Dark Side)



p/d: I'm not sure if something like this has already been said, but it's been almost a year since my last login, so I honestly didn't read all the pages, but it was still a interesting topic

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"And if the band you're in starts playing diferent tunes, I'll see you on the Dark Side of the Moon"