It's interesting to see that the average earnings of people who bike to work are increasing so much faster than the other groups. There's a stereotype that people who bike for transportation are just rich spoiled white liberals. I have no idea where it came from, and I'm pretty sure that historically it has been the opposite of the truth, but it's used as a political weapon by people on both ends of the political spe…
It's true. Go to Europe, poor people ride the bus the better-off use a bike. I think it'd have to do because of things like getting a bike requiring a larger initial capital investment, plus there's the danger of it being stolen (which is smaller if you live in a nicer neighborhood).
This was my impression from the United States, too, but then numbers made me look again, and I started to notice a lot of people who didn't fit my assumptions. The image that makes me think "bike commuter" is someone briskly riding a practical, efficient bike with a laptop bag of some kind, so I was ignoring a lot of other people who are often not carrying anything, not riding very fast, riding an ill-fitting bike or one not particularly suited for commuting. It never occurred to me that those people might be riding to work.