This one should be fairly obvious. Gasoline is at $4 a gallon and people begin to use public transportation more.
That's what the privileged class would like to see more of. Let the rubes pack onto the bus while they travel in private jets and limos.
Don't get me wrong. If I had Al's money I probably wouldn't travel in coach with the riff-raff, either. But I hope I wouldn't be running my mouth about you people out there need to consume less so that we can save the planet and then hop onto my Gulfstream and jet off to the next Save A Whale conference.