No. It’s not the employers fault that Alice spent more money on her mode of transportation.
This is why paying people for their commute is unreasonable. Payment by mileage is based fuel costs mostly. Some wear and tear, but mainly it’s to offset the fuel cost. If someone rides a bike to work, they don’t have fuel costs, therefore should not be compensated.
I’m convinced that a high percentage of these assclowns run for these positions as a front to do whatever other illegal activities they really want to do.