Coke makes you work harder, Im not talking from experience, but many great albums have been made on coke (Motley Crue - Shout At The Devil, Oasis - Be Here Now). Tommy Lee said on Shout they were working for 3 days straight without sleep and they still felt like they were slacking off, whereas without coke they probably wouldnt even have showed up to the studio. Also in Noel Gallaghers case he assumed everyone wanted to hear extended guitar solos in every song and the result was an album of 6 minute fret-wanker songs.