Because no one who rides a bike doesn't own or rent in this city, thereby paying property taxes directly or indirectly.   Not a single cyclist pays income tax. They don't frequent Oregon businesses at all.  

What are the benefits of bikes on the roads.

Less space taken up, more room for those who do want to drive, less congestion.

Less damage to the roads one person on a bike certainly produces less damage than a person in a car.

Less air pollution.

Better health thereby lowering the cost of healthcare for all.

Those damn cyclists just costing us money left and right.