Why Not One Hundred MPG?

As read in Popular Mechanics:

"...It became fashionable to drive SUVs because they projected an image of power and an active lifestyle. It's possible to imagine drivers being drawn to the environmental and national security benefits of efficiency--and to the cutting-edge engineering, as well.

So perhaps people have been asking the wrong question all along. It's not, "Why can't they build a 100-mpg car?" but rather, "Do we really want one?”