I like Bonecruncher's idea of loyalty to one's employers. Trouble is, these days as a folk musician and a storyteller I don't have just one employer and my work takes me all over the country. Yes, there are people who do, and who could walk there, just as there are many children who could (and probably should) walk to school. But not everyone can. There are also people with health problems for whom a long walk in snowy conditions would not be a healthy option (I'm an asthmatic, and even walking back from town is a dodgy proposition as it involves a very long steep hill).
For some of us having a green consciousness is not enough. Improve public transport and that would be a move in the right direction!

Anne