Drivers pay [gas] tax to cover [a small percentage of the] costs of roads, including bike lanes, why shouldn't bikes pay some of this?
FTFY. Most of the rest is just general tax money, from everyone...no matter how they get around.
Pedal, coast. Pedal, coast. Pedal, coast.
I commute by bike every day. It has to be pretty windy from the right (wrong) direction for me to breathe much harder than I would be if I were walking. Some people want to show everyone how into cycling they are and what great shape they are in (in which case, they probably aren't breathing that hard either).....but some of us are just "pedal pedal coast, pedal pedal coast"ing to work.
Trust me, no one will be idle.
Trust me. I will be.
Do you suffer painful illumination? -- Isaac Newton, "Optics"